Notilus CFD

Ship resistance and free-surface analysis inside Rhino 7.

Notilus CFD gives you the calm-water resistance of the hull you modelled in Rhino. One panel takes you from hull selection to a resistance curve, a PDF report and a first propeller and engine check.

What you get

Total resistance and effective power at each speed, with the pressure and friction split.
The wave pattern around the hull, in the Rhino viewport.
The pressure distribution on the hull surface.
Running trim and sinkage at each speed, as an indication.
Wageningen B-series open-water values for a first propeller pick.
Delivered, brake and installed power, and the load on your engines.
A PDF report of every loading condition and speed.

Before you start

You need Windows 10 (version 2004 or later) or Windows 11, Rhino 7, and OpenFOAM v2412, which you install separately. Installation walks you through it. Everything runs from one command, NcfdPanel.

In this guide

Trim and sinkage are an indication. Results from Notilus CFD do not replace towing-tank testing or naval-architecture certification.

INSTALLATION

1. System requirements

You need a 64-bit Windows PC with Rhino 7. Plan on 64 GB of RAM if you will run fine meshes.

Item	Requirement
Operating system	Windows 10 version 2004 (build 19041) or later, or Windows 11, 64-bit
Rhino	Rhino 7 for Windows, latest service release (the plug-in is built against Service Release 37)
Solver backend	OpenFOAM v2412 from openfoam.com, installed in Ubuntu on WSL 2 (next step)
Memory (RAM)	64 GB recommended. Fine meshes (2–3 million cells) need about 40 GB available to the solver
Processor	Multi-core. A run uses up to 6 cores by default, and you can change this for each run
Disk space	About 2 GB per completed run, plus the Ubuntu and OpenFOAM installation
Account rights	Administrator rights and an internet connection, to install WSL and OpenFOAM

Rhino for Mac is not supported.

1. Requisiti di sistema

Ti serve un PC Windows a 64 bit con Rhino 7. Prevedi 64 GB di RAM se userai mesh fini.

Voce	Requisito
Sistema operativo	Windows 10 versione 2004 (build 19041) o successiva, oppure Windows 11, 64 bit
Rhino	Rhino 7 per Windows, ultimo service release (il plug-in è compilato per il Service Release 37)
Solutore	OpenFOAM v2412 da openfoam.com, installato in Ubuntu su WSL 2 (passo successivo)
Memoria (RAM)	64 GB consigliati. Le mesh fini (2–3 milioni di celle) richiedono circa 40 GB disponibili per il solutore
Processore	Multi-core. Un calcolo usa fino a 6 core per impostazione predefinita, e puoi cambiarlo a ogni calcolo
Spazio su disco	Circa 2 GB per ogni calcolo completato, più l'installazione di Ubuntu e OpenFOAM
Diritti dell'account	Diritti di amministratore e una connessione a internet, per installare WSL e OpenFOAM

Rhino per Mac non è supportato.

2. Install OpenFOAM v2412

Install OpenFOAM v2412 (the openfoam.com release), the version Notilus CFD 0.1.0 is validated with. Follow the official instructions from Microsoft and OpenFOAM linked below; this page only adds the choices Notilus CFD needs.

Install WSL 2 with Ubuntu. Follow Microsoft's guide, How to install Linux on Windows with WSL. In short: open PowerShell as administrator, run wsl --install and restart when asked. Then open Ubuntu once and create your Linux user name and password.
Install OpenFOAM v2412 in Ubuntu. On the OpenFOAM download page, open the precompiled packages for Linux and follow the Debian/Ubuntu instructions (OpenFOAM precompiled packages). Run the commands in the Ubuntu window, choose version v2412 (package openfoam2412-default) and keep the default install location.
Check it from Windows. In PowerShell, run wsl -e bash -c "ls /usr/lib/openfoam". It should print openfoam2412.

Three things to watch

Use the Ubuntu package instructions. OpenFOAM's separate “Installation on Windows 10” page describes v2012, which is too old for Notilus CFD.
Notilus CFD uses your default WSL distribution. If other distributions are installed (Docker Desktop adds some), make Ubuntu the default with wsl --set-default Ubuntu.
Keep only one OpenFOAM version installed.

3. Install the plug-in

Extract the Notilus CFD .zip package to a permanent folder, then install NotilusCFD.rhp from Rhino's plug-in options.

Close Rhino.
Unblock the download. Right-click the .zip file and choose Properties. If an Unblock box shows at the bottom, tick it and click OK. Windows can block plug-in files that come from the internet.
Extract to a permanent folder, for example C:\Notilus\NotilusCFD. Keep all the files together: NotilusCFD.rhp, NotilusCFD.rui and the .dll files. Rhino loads the plug-in from this folder every time it starts, so don't use Downloads or a temporary folder.
Install in Rhino 7. Start Rhino, open Tools › Options › Plug-ins, click Install… and select NotilusCFD.rhp.
Confirm. Notilus CFD (Notilus Software) shows in the plug-in list. Type NcfdPanel and press Enter to open the Notilus CFD panel. The Notilus CFD menu and toolbar open the same panel.

4. First-time setup

Check two settings once: where Notilus CFD saves your work, and how much memory the solver can use.

Data folder

Notilus CFD saves projects and runs in %USERPROFILE%\NotilusCFD, for example C:\Users\anna\NotilusCFD. The path must not contain spaces. If your Windows user name has one, Notilus CFD uses C:\Users\Public\NotilusCFD instead. To keep your data on another drive, set a user environment variable NOTILUS_CFD_DATA to a folder without spaces, such as D:\NotilusCFD, then restart Rhino.

Solver memory

By default WSL 2 gives Linux half of your PC's memory. Fine meshes need about 40 GB, so raise the limit on a 64 GB PC:

Create a file named .wslconfig in your user folder (C:\Users\<you>\.wslconfig) containing:
```
[wsl2]
memory=56GB
```
Set the value to your RAM minus about 8 GB; 56GB suits a 64 GB PC. In Notepad, set Save as type to All files so the file isn't saved as .wslconfig.txt.
In PowerShell, run wsl --shutdown, then start Rhino again.

Notilus CFD checks this limit at the start of every run and shows a warning when the solver has less than 40 GB.

4. Prima configurazione

Controlla una volta due impostazioni: dove Notilus CFD salva il tuo lavoro e quanta memoria può usare il solutore.

Cartella dei dati

Notilus CFD salva progetti e calcoli in %USERPROFILE%\NotilusCFD, ad esempio C:\Users\anna\NotilusCFD. Il percorso non deve contenere spazi. Se il tuo nome utente Windows ne contiene uno, Notilus CFD usa invece C:\Users\Public\NotilusCFD. Per tenere i dati su un'altra unità, imposta una variabile d'ambiente utente NOTILUS_CFD_DATA con una cartella senza spazi, ad esempio D:\NotilusCFD, poi riavvia Rhino.

Memoria del solutore

Per impostazione predefinita WSL 2 assegna a Linux metà della memoria del PC. Le mesh fini richiedono circa 40 GB, quindi su un PC da 64 GB aumenta il limite:

Crea un file chiamato .wslconfig nella tua cartella utente (C:\Users\<nome>\.wslconfig) con questo contenuto:
```
[wsl2]
memory=56GB
```
Imposta il valore alla tua RAM meno circa 8 GB; 56GB va bene per un PC da 64 GB. In Blocco note imposta Salva come su Tutti i file, così il file non viene salvato come .wslconfig.txt.
In PowerShell esegui wsl --shutdown, poi riavvia Rhino.

Notilus CFD controlla questo limite all'inizio di ogni calcolo e mostra un avviso quando il solutore ha meno di 40 GB.

5. Check the installation

A test mesh proves that Rhino, the plug-in and OpenFOAM work together, without waiting for a full run. The panel estimates 30–90 seconds for it.

Open a model that contains a hull, type NcfdPanel and press Enter.
Select the hull in the viewport and click Select Hull from Rhino. The status line reads “Geometry ready — configure parameters and run”.
On the Flow Conditions tab, set Waterline Location Z (m) to a height that crosses the hull.
On the Mesh Settings tab, click Bake Mesh in Rhino (preview). If a “Notilus CFD — mesh size” dialog appears, click Yes to use the suggested size.

The installation works when the log ends with “Preview mesh baked” and a mesh named NotilusCFD_PreviewMesh appears in the model. You can delete that mesh afterwards. If the log says “WSL or OpenFOAM not available — cannot bake mesh”, see Troubleshooting.

6. Update or uninstall

To update, replace the files in your plug-in folder. To uninstall, turn the plug-in off in Rhino and delete that folder.

Update to a new version

Close every Rhino window. Rhino locks the plug-in files while it runs.
Unblock and extract the new .zip, then copy its files over the old ones in your plug-in folder, for example C:\Notilus\NotilusCFD.
Start Rhino. The plug-in stays in the plug-in list, so you don't need to install it again.

If an early test build named MarineCFD is installed, remove it before you install Notilus CFD. Both use the same plug-in ID.

Uninstall

In Tools › Options › Plug-ins, clear the check box next to Notilus CFD so it no longer loads. Then close Rhino.
Delete the plug-in folder.
Your projects and runs stay in the data folder (see First-time setup). Delete it yourself if you no longer need them.

OpenFOAM and WSL stay installed. Remove them with their own uninstall instructions if you no longer need them.

WORKFLOW

3. Set the flow conditions

On the Flow Conditions tab:

Enter Ship Speed (knots). The panel shows the speed in m/s with the Reynolds and Froude numbers.
Set Waterline Location Z (m) to the waterline you want to analyse. It must lie between the keel and top heights reported when you selected the hull. Draft, wetted area, displacement and LCB are recalculated at this waterline when you run.
Check Water Density and Kinematic Viscosity. The defaults are seawater at 15 °C: 1025 kg/m³ and 1.139 × 10⁻⁶ m²/s.
Enter your own Windage Area (m²) and Air Drag Coeff. (Cd) to include air resistance.
Set Appendage Drag (% of R_CFD) for rudders, shafts, shaft brackets and other parts that are not in the model. Notilus CFD proposes a value; typing your own replaces it.

Tick Show waves in viewport during simulation to watch the wave pattern form while the run is going.

Leave the advanced options on this tab (dynamic motion, wake sampling and the propelled run) switched off for a standard resistance run.

4. Choose the mesh settings

On the Mesh Settings tab:

Mesh Quality Preset: Medium is the default and the starting point for most studies. Coarse (Fast) gives a quicker first look; Fine (Accurate) takes longer. The preset switches to Custom when you change an individual value.
Volume Mesher: keep the recommended option, marked “validated resistance”. The second option, “wave & flow field”, is for sharper wave and flow pictures.
STL Density: Fine (recommended) follows curved and sharp hull features more closely; Standard exports faster.
Base Cell Size (m): about one tenth of the hull length. If your value is far from that, Notilus CFD warns you and offers it.

Click Bake Mesh in Rhino (preview) to check the mesh on the hull before you commit to a run. A preview mesh named NotilusCFD_PreviewMesh appears in the model. For a speed sweep, tick Reuse last baked mesh so later runs skip meshing; the mesh does not depend on speed.

Leave the refinement and boundary-layer values at the preset unless Notilus support advises otherwise.

7. Read the results

When the run finishes, the Results tab has four views:

Forces: hydrodynamic drag, roughness allowance, appendage and air drag, total resistance R_t and effective power P_e; the pressure and friction split; side and lift force; roll, pitch and yaw moments; sinkage and trim; and the Cd, Cp and Cf coefficients.
Residual and Force Convergence: how the run settled.
Visualization: click Load VTK Data, then show or hide the pressure distribution (Cp colour map), the wetted surface, streamlines (optionally animated) and the wave surface. Clear Visualization removes them from the viewport.

Trim and sinkage are an indication of how the hull sits under way.

Wave pattern around the hull in the Rhino viewport — Free-surface elevation and the Kelvin wake, as a mesh you can rotate and section.

Pressure map on the hull surface — Pressure distribution on the hull surface.

8. Save runs and build the report

Use the Project tab to collect runs into a speed curve:

Type a name under New project and click Create. Fill in Vessel, Units, Lwl / Beam (m) and Notes, then click Save Project Details.
Under Loading conditions, type a name such as Half load or Full load and click Add.
Select the condition and click Save Current Run → Condition. The run appears in the table with speed, R_t, P_e, sinkage, trim and displacement.
For each further speed, change Ship Speed, run again and save the run to the same condition.
Click Generate PDF Report.

The report lists every loading condition with its hydrostatics and runs table, and plots resistance (total, pressure and friction) and effective power against speed.

Project data and loading conditions — Vessel data and loading conditions are saved with the project.

Running trim and sinkage across the speed range.

10. Size the engines

The Engine Selection tab carries the resistance from the last result through to the power your engines must deliver.

Choose the Propulsion type (shaft and propeller, IPS/pod drive or waterjet), the Number of engines and the Engine rating of each, in kW.
Enter the propulsive factors: wake fraction w, thrust deduction t, open-water efficiency η_O (or send it from Propeller Selection) and relative rotative efficiency η_R. The panel shows hull efficiency η_H and the quasi-propulsive coefficient η_D.
Enter the shaft and gearbox efficiencies, the sea margin and the engine load at service (% MCR).

The power chain shows effective power P_E from the CFD result, delivered power P_D, brake power, service power with sea margin, the MCR required per engine, and the load on your installed engines.

Engine selection and power chain — From effective power to the load on the installed engines.

Sample Outputs

What Notilus CFD returns for a hull, from the wave pattern to the engine load. Click an image to open it full size.

**Wave pattern in the viewport** — free-surface elevation and the Kelvin wake, shown in Rhino as a mesh you can rotate, section and put in a client presentation.

**Pressure map on the hull** — stagnation at the stem, separation behind a hard chine, and where the shape is fighting the water.

Running trim and sinkage — **Running trim & sinkage** — trim and sinkage at every speed, an indication of how the hull sits under way.

**Live force convergence** — pressure and friction force histories plotted while the run is still going.

**Propeller selection** — Wageningen B-series open-water values turn the resistance into a first propeller pick.

**Engine selection** — delivered power for your installation and the load on the installed engines.

PDF report

Generate PDF Report on the Project tab produces a report with every loading condition, its hydrostatics and runs table, and resistance and effective-power curves against speed.

Panel Reference

The main settings on each tab of the Notilus CFD panel. Settings not listed here can stay at their defaults.

Top of the panel

Setting	Description
Simulation Type	Keep the default free-surface setting, the validated resistance workflow. The other option runs without a free surface and, for monohulls, adds a Holtrop-Mennen estimate of wave-making resistance.
Select Hull from Rhino	Takes the selected hull surfaces or polysurface and reports their main dimensions and hydrostatics.
Run Simulation / Cancel	Starts or stops a run.

Flow Conditions

Setting	Description
Ship Speed (knots)	Speed for this run. The Reynolds and Froude numbers are shown below it.
Waterline Location Z (m)	Height of the waterline in model coordinates. It must cross the hull.
Water Density (kg/m³)	Default 1025 (seawater).
Kinematic Viscosity (m²/s)	Default 1.139 × 10⁻⁶ (seawater at 15 °C).
Windage Area, Air Drag Coeff. (Cd), Air Density	Air resistance of the topsides and superstructure.
Appendage Drag (% of R_CFD)	Allowance for appendages that are not in the model. Proposed automatically; your own value replaces it.
Hull type	Monohull or Catamaran, detected when you select the hull.
Show waves in viewport during simulation	Draws the wave pattern while the run is going.

Mesh Settings

Setting	Description
Mesh Quality Preset	Coarse (Fast), Medium (default), Fine (Accurate) or Custom.
Volume Mesher	Recommended: “validated resistance”. Alternative: “wave & flow field”, for wave and flow pictures.
STL Density	Fine (recommended) or Standard (faster export).
Reuse last baked mesh	Skips meshing on the next runs. Use it for speed sweeps.
Base Cell Size (m)	About one tenth of the hull length. Notilus CFD checks it before meshing.
Bake Mesh in Rhino (preview)	Builds the mesh only and shows it on the hull as `NotilusCFD_PreviewMesh`.

Solver Settings

Setting	Description
CPU Count	Processor cores used by the run; up to 6 by default.
End Time (s)	Simulated flow time, suggested from hull length and speed.

Results

View	Description
Forces	Resistance components, R_t, P_e, forces and moments, sinkage and trim, and the Cd, Cp and Cf coefficients.
Residual / Force Convergence	How the run settled.
Visualization	Load VTK Data, then show the pressure map, wetted surface, streamlines and wave surface. Clear Visualization removes them.

Propeller Selection

Section	Description
Propeller geometry	Blades Z, A_E/A₀, P/D and diameter D of a Wageningen B-series propeller.
Operating point	Engine speed, gearbox ratio, ship speed and wake fraction w.
Results	n, V_a, J, K_t, 10·K_q and η₀. Send η0 → Engine Selection passes η₀ on.

Engine Selection

Section	Description
Propulsion	Propulsion type (shaft and propeller, IPS/pod drive or waterjet), number of engines and the rating of each (kW).
Propulsive efficiency	w, t, η_O and η_R, giving hull efficiency η_H and the quasi-propulsive coefficient η_D.
Transmission and margins	Shaft and gearbox efficiency, sea margin and engine load at service (% MCR).
Power chain	P_E, P_D, brake power, service power, MCR per engine and the load on the installed engines.

Project

Setting	Description
Project / New project	Select, create or delete a project.
Vessel, Units, Lwl / Beam (m), Notes	Project details. Save them with Save Project Details.
Loading conditions	Add or remove conditions such as Half load and Full load.
Runs in selected condition	Saved runs with speed, R_t, P_e, sinkage, trim and displacement.
Save Current Run → Condition	Adds the current result to the selected condition.
Generate PDF Report	Report of all conditions and runs.

Riferimento del pannello

Le impostazioni principali di ogni scheda del pannello Notilus CFD. Le impostazioni non elencate possono restare ai valori predefiniti.

Parte superiore del pannello

Impostazione	Descrizione
Simulation Type	Lascia l'impostazione predefinita a superficie libera, il flusso validato per la resistenza. L'altra opzione calcola senza superficie libera e, per i monoscafi, aggiunge una stima Holtrop-Mennen della resistenza d'onda.
Select Hull from Rhino	Acquisisce le superfici o la polisuperficie selezionate e ne riporta dimensioni principali e dati idrostatici.
Run Simulation / Cancel	Avvia o interrompe un calcolo.

Flow Conditions

Impostazione	Descrizione
Ship Speed (knots)	Velocità di questo calcolo. Sotto vengono mostrati i numeri di Reynolds e di Froude.
Waterline Location Z (m)	Quota della linea di galleggiamento nelle coordinate del modello. Deve attraversare la carena.
Water Density (kg/m³)	Predefinito 1025 (acqua di mare).
Kinematic Viscosity (m²/s)	Predefinito 1,139 × 10⁻⁶ (acqua di mare a 15 °C).
Windage Area, Air Drag Coeff. (Cd), Air Density	Resistenza dell'aria su opera morta e sovrastrutture.
Appendage Drag (% of R_CFD)	Maggiorazione per le appendici non presenti nel modello. Proposta automaticamente; un tuo valore la sostituisce.
Hull type	Monohull o Catamaran, riconosciuto alla selezione della carena.
Show waves in viewport during simulation	Mostra il sistema ondoso durante il calcolo.

Mesh Settings

Impostazione	Descrizione
Mesh Quality Preset	Coarse (Fast), Medium (predefinito), Fine (Accurate) o Custom.
Volume Mesher	Consigliato: “validated resistance”. Alternativa: “wave & flow field”, per immagini di onde e flusso.
STL Density	Fine (consigliata) o Standard (esportazione più rapida).
Reuse last baked mesh	Salta la generazione della mesh nei calcoli successivi. Usalo per le serie di velocità.
Base Cell Size (m)	Circa un decimo della lunghezza della carena. Notilus CFD lo controlla prima di generare la mesh.
Bake Mesh in Rhino (preview)	Genera solo la mesh e la mostra sulla carena come `NotilusCFD_PreviewMesh`.

Solver Settings

Impostazione	Descrizione
CPU Count	Core del processore usati dal calcolo; fino a 6 per impostazione predefinita.
End Time (s)	Tempo di flusso simulato, proposto in base a lunghezza della carena e velocità.

Results

Vista	Descrizione
Forces	Componenti di resistenza, R_t, P_e, forze e momenti, affondamento e assetto, e i coefficienti Cd, Cp e Cf.
Residual / Force Convergence	Come si è assestato il calcolo.
Visualization	Load VTK Data, poi mostra mappa delle pressioni, superficie bagnata, linee di flusso e superficie d'onda. Clear Visualization le rimuove.

Propeller Selection

Sezione	Descrizione
Geometria dell'elica	Pale Z, A_E/A₀, P/D e diametro D di un'elica della serie B di Wageningen.
Punto di funzionamento	Regime del motore, rapporto del riduttore, velocità della nave e frazione di scia w.
Risultati	n, V_a, J, K_t, 10·K_q e η₀. Send η0 → Engine Selection trasferisce η₀.

Engine Selection

Sezione	Descrizione
Propulsione	Tipo di propulsione (asse ed elica, trasmissione IPS/pod o idrogetto), numero di motori e potenza di ciascuno (kW).
Rendimento propulsivo	w, t, η_O e η_R, da cui il rendimento di carena η_H e il coefficiente quasi-propulsivo η_D.
Trasmissione e margini	Rendimento di asse e riduttore, margine di mare e carico del motore in servizio (% MCR).
Catena delle potenze	P_E, P_D, potenza al freno, potenza di servizio, MCR per motore e carico sui motori installati.

Project

Impostazione	Descrizione
Project / New project	Seleziona, crea o elimina un progetto.
Vessel, Units, Lwl / Beam (m), Notes	Dati del progetto. Salvali con Save Project Details.
Loading conditions	Aggiungi o rimuovi condizioni come Mezzo carico e Pieno carico.
Runs in selected condition	Calcoli salvati con velocità, R_t, P_e, affondamento, assetto e dislocamento.
Save Current Run → Condition	Aggiunge il risultato corrente alla condizione selezionata.
Generate PDF Report	Report di tutte le condizioni e di tutti i calcoli.

Troubleshooting

Most problems are a missing or hidden OpenFOAM, a blocked plug-in file or a waterline that misses the hull. The messages below appear in the panel log.

What you see	What to do
“ERROR: WSL2 not found!”	WSL is not installed or does not start. Repeat Installation step 2, restart Windows and open Ubuntu once.
“ERROR: OpenFOAM not found in WSL!”	Run the check in Installation step 2. If it fails, make Ubuntu the default distribution with `wsl --set-default Ubuntu`. If it still fails, reinstall OpenFOAM v2412 in its default location.
The check in Installation step 2 prints an error	Run `wsl -l -v`. The default distribution is marked with *. It must be the Ubuntu that has OpenFOAM installed.
Notilus CFD does not load in Rhino	Unblock the .zip, extract it again into one folder and reinstall `NotilusCFD.rhp`. Then update Rhino 7 with Help › Check for Updates.
Rhino refuses Notilus CFD because the plug-in is already installed	An early test build named MarineCFD uses the same plug-in ID. Uninstall it first.
An update fails because files are in use	Close every Rhino window and copy the files again.
“Select hull geometry from Rhino first!”	Select the hull in the viewport, then click Select Hull from Rhino.
“WARNING: could not cut the hull at WL Z=…”	The waterline misses the hull. Set Waterline Location Z between the keel and top heights shown when you selected the hull.
A “Notilus CFD — mesh size” dialog appears	The base cell size is far from one tenth of the hull length. Click Yes to use the suggested size.
“WARNING: WSL has only ~N GB RAM”	Raise the solver memory (Installation step 4).
A fine-mesh run stops progressing	The solver has probably run out of memory. Raise the solver memory (Installation step 4) or use a coarser mesh.
“NOTE: only N MB free on the WSL drive”	Free space on the drive that holds your data folder. Each run needs about 2 GB.
The forces are still drifting at the end of a run	Increase End Time on the Solver Settings tab and run again.

Still stuck? Email support@notilussoftware.com with your Notilus CFD version, your Rhino version and the text from the panel log.

Risoluzione dei problemi

La maggior parte dei problemi deriva da OpenFOAM mancante o non trovato, da un file del plug-in bloccato o da una linea di galleggiamento che non attraversa la carena. I messaggi qui sotto compaiono nel log del pannello.

Cosa vedi	Cosa fare
“ERROR: WSL2 not found!”	WSL non è installato o non si avvia. Ripeti il passo 2 dell'installazione, riavvia Windows e apri Ubuntu una volta.
“ERROR: OpenFOAM not found in WSL!”	Esegui la verifica del passo 2 dell'installazione. Se non riesce, imposta Ubuntu come distribuzione predefinita con `wsl --set-default Ubuntu`. Se ancora non riesce, reinstalla OpenFOAM v2412 nel percorso predefinito.
La verifica del passo 2 restituisce un errore	Esegui `wsl -l -v`. La distribuzione predefinita è segnata con *. Deve essere l'Ubuntu in cui è installato OpenFOAM.
Notilus CFD non si carica in Rhino	Sblocca il .zip, estrailo di nuovo in un'unica cartella e reinstalla `NotilusCFD.rhp`. Poi aggiorna Rhino 7 (Help › Check for Updates).
Rhino rifiuta Notilus CFD perché il plug-in risulta già installato	Una prima versione di prova chiamata MarineCFD usa lo stesso ID di plug-in. Disinstallala prima.
Un aggiornamento non riesce perché i file sono in uso	Chiudi tutte le finestre di Rhino e copia di nuovo i file.
“Select hull geometry from Rhino first!”	Seleziona la carena nella vista, poi fai clic su Select Hull from Rhino.
“WARNING: could not cut the hull at WL Z=…”	La linea di galleggiamento non attraversa la carena. Imposta Waterline Location Z tra le quote di chiglia e di sommità mostrate alla selezione della carena.
Compare la finestra “Notilus CFD — mesh size”	La dimensione della cella di base è lontana da un decimo della lunghezza della carena. Fai clic su Yes per usare la dimensione proposta.
“WARNING: WSL has only ~N GB RAM”	Aumenta la memoria del solutore (passo 4 dell'installazione).
Un calcolo con mesh fine smette di avanzare	Probabilmente il solutore ha esaurito la memoria. Aumenta la memoria del solutore (passo 4 dell'installazione) o usa una mesh più grossolana.
“NOTE: only N MB free on the WSL drive”	Libera spazio sull'unità che contiene la cartella dei dati. Ogni calcolo richiede circa 2 GB.
Le forze oscillano ancora a fine calcolo	Aumenta End Time nella scheda Solver Settings e ripeti il calcolo.

Serve ancora aiuto? Scrivi a support@notilussoftware.com indicando la versione di Notilus CFD, la versione di Rhino e il testo del log del pannello.

Notilus CFD

What you get

Before you start

In this guide

Notilus CFD

Cosa ottieni

Prima di iniziare

In questa guida

1. System requirements

1. Requisiti di sistema

2. Install OpenFOAM v2412

2. Installa OpenFOAM v2412

3. Install the plug-in

3. Installa il plug-in

4. First-time setup

Data folder

Solver memory

4. Prima configurazione

Cartella dei dati

Memoria del solutore

5. Check the installation

5. Verifica l'installazione

6. Update or uninstall

Update to a new version

Uninstall

6. Aggiorna o disinstalla

Aggiornare a una nuova versione

Disinstallare

1. Open the panel

1. Apri il pannello

2. Select the hull

2. Seleziona la carena

3. Set the flow conditions

3. Imposta le condizioni di flusso

4. Choose the mesh settings

4. Scegli le impostazioni della mesh

5. Set up the solver

5. Configura il solutore

6. Run and monitor

6. Avvia e monitora il calcolo

7. Read the results

7. Leggi i risultati

8. Save runs and build the report

8. Salva i calcoli e crea il report

9. Match a propeller

9. Scegli un'elica

10. Size the engines

10. Dimensiona i motori

NcfdPanel

Steps

NcfdPanel

Passaggi

Sample Outputs

PDF report

Esempi di output

Report PDF

Panel Reference

Top of the panel

Flow Conditions

Mesh Settings

Solver Settings

Results

Propeller Selection

Engine Selection

Project

Riferimento del pannello

Parte superiore del pannello

Flow Conditions

Mesh Settings

Solver Settings

Results

Propeller Selection

Engine Selection

Project

Troubleshooting

Risoluzione dei problemi