Marine - Recent Threads

Fine Marine: The machine's VDH is not found.

Gaurav — Mon, 05 May 2025 07:39:21 GMT

To use the Fine Marine solver, a separate license file, including the machine's VDH, is required. Errors may occur when checking the license, indicating an incorrect or missing machine VDH. Resolving this issue is necessary to ensure the Fine Marine solver functions correctly.

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1OPP000001718T2AQ&pageName=ArticleContent

Article ejection

saji vf — Mon, 24 Feb 2025 06:27:11 GMT

Hello sir,

Hope you are doing well,

can we do Article ejection for underwater vehicles?

1.We wanted to move article with propeller rotation along underwater vehicle moving.

2. is there any similar case study has been done in fine marine?

Thank you.

water entry

saji vf — Fri, 30 Aug 2024 08:42:21 GMT

Hello,

can we do missile water entry case 3D in fine marine ,

1.if we can do how do we proceed through overset meshing (a case file if possible ) or case settings.

2. any validation done in fine marine?

Thank you.

mooring lines

saji vf — Wed, 21 Aug 2024 05:02:39 GMT

Hello,

We are trying to simulate same as Paper "A procedure for the static analysis of cable structures following elastic catenary theory" by using mooring lines but in a different way by splitting the lines .

lines starts at body end and gets attached to a buoy with three spitted lines.
my doubt is how to visualize bending of those lines with due to loads in CFview.
can we simulate a catenary appraoch with mooring lines "Simulation Requirements for Tethered Sonar Array in Fine Marine".

Thank you.

community.cadence.com/.../A-procedure-for-the-static-analysis-of-cable-structures-following-elastic-catenary-theory-_2D00_-1_2D00_s2.0_2D00_S0020768314000031_2D00_main.pdf

PROPELLER CAVITATION

saji vf — Mon, 29 Jul 2024 11:20:10 GMT

Hello,

we are trying to capture propeller cavitation for 10 deg with time step size=0.0028 for periodic mesh with K-omega (sst menter). we were able to observe the cavitation pattern after some 6000 time steps,

But in the residuals the K started to increase after 5000 time steps and OMEGA is fluctuating from the start(>1000). what could be the possible reason ?

The same periodic mesh was used in FLUENT Software too, got the required cavitation.

Turning circle

saji vf — Thu, 25 Jul 2024 03:39:49 GMT

Hello ,

We are doing a turning circle simulation by giving radius and angular velocity in Rz motion (unsteady case) !

my doubt is:

1. how much time it will take to complete the simulation if my body is an appended model with mesh size of 11M?

2. i ran the simulation for around 200 sec with time step size of 0.023 .

3. can you guide me how to proceed further to get the convergence and complete the simulation.

Thank you .

cavitation of propeller

saji vf — Mon, 17 Jun 2024 06:30:41 GMT

Hello !

we are trying to simulate cavitation case of a propeller from an open water case as mentioned in the attachment.

we are facing the following isses:

1. while running the cavitation case the initial cavitation number( taken =2.63) is not changing to the desired cavitation number(2.024). In the output file, we observed the initial cavitation parameter 2.63 is constant throughout all the time steps.

2. can we simulate cavitation noise in fine marine ?

maneuvering

saji vf — Wed, 29 May 2024 04:59:01 GMT

Hello,

im trying to do static drift case condition,

1. in tutorials it was saying tx imposed with acceleration ramp and ty imposed with drift angle, but my doubt is how should we imply drift angle.

2. can you please share the formulae for implying drift angle and should we give the value deg or radians.

Thank you

fine marine sequential mode script in linux slurm cluster

saji vf — Fri, 17 May 2024 06:51:57 GMT

Hello,

Im working on fine marine in linux slurm cluster through batch script for sometime, my doubt :

1. can we run the cases in sequential mode (one by one) through script

2. how to pause the simulation while running is going on through code.

Thank you.

Reduce computing

TobiasB — Fri, 10 May 2024 07:50:39 GMT

I am currently working on a projekt, and i am very new to CFD.

I need to test a hydrofoil-catamaran and see how it acts on water.

For this setup i followed tutorial 5 for planning (assuming this is fitting for my problem)

However i run into a solving problem, since this is all done on my home pc.

It seems i do not meet the required CPU power for the planning tutorial unfortunately, which results in a very long computing time.

Is there any way i can reduce Solving time for this simulation?

If in any way possible, i would love to do a self-propulsion test on the catamaran, although it would require even more.

pc specifications:

Intel i5-10600K 6 cores, 4.5GHz

16gb ram

3060Ti GPU

Thanks in advance!

-Tobias Brandt

Cores

TobiasB — Thu, 09 May 2024 06:59:30 GMT

Hello

Is it possible to utilize GPU cores for solving?

When trying to solve it simply takes forever

Thanks in advance

(currently running 6 cores 12 threads, 10th gen intel)

planning hull

saji vf — Mon, 22 Apr 2024 06:09:33 GMT

Hello,

we are using savitsky method while doing a planing regime case for a single speed with different configurations.

now my question is:

1.I have made meshes for different configurations and ran for single speed, can i reuse the mesh for different speeds or i need to do new mesh for every single speed.

Thank you.

seakeeping

saji vf — Fri, 05 Apr 2024 09:25:05 GMT

Hello sir,

we are working on seakeeping case for past few days, simulation completed well but we dont know how to postprocess the result or to animate it.

1. can u tell u procedure of how to do it?

added resistance

saji vf — Tue, 26 Mar 2024 11:28:56 GMT

Hello,

1. can we add added resistance to a multiphase vof simulation (like a external force)?

2. on what significance wall roughness is taken?

Thank you.

Resistance

saji vf — Fri, 16 Feb 2024 09:44:48 GMT

Hello,

we are doing a resistance case for a vessel with appendages like bilge_keel, rudder etc.,

1. while running the simulation it was running smoothly at start , the velocity is ramping to the final time, but after some time steps like (1200) the solution is diverging with negative volumes.

2. we have used AGR (adaptive grid refinement) but no use , how can we solve this issue.

Thank you.

seakeeping

saji vf — Tue, 06 Feb 2024 11:25:38 GMT

Hello sir,

we are trying to do a sea keeping case , but it is taking too much time

1. can we do the panel method in fine marine (potential flow)?

Thank you

resistance

saji vf — Thu, 01 Feb 2024 06:49:22 GMT

Hello, we have worked on a vessel with appendages - a Resistance case.

1.now we are trying to take resistance individually in cf view for the appendages like for example if i have a rudder i want the resistance of it separately (pressure, viscous, total).

2. can we extract the streamlines data in cf view.

Thank you.

self propulsion using actuator disk

saji vf — Thu, 04 Jan 2024 05:07:02 GMT

Hello,

we are trying to do self propulsion analysis using actuator disk but we don't have any open water data to include , actually in demo case 8 of numeca the case file has done with actuator disk only but they used open water data for running the case.

can you explain how to run the self propulsion with AD.

Thank you.

trim condition

saji vf — Sat, 23 Dec 2023 05:55:32 GMT

Hello , can we know where to specify forward and aft trim in fine marine, because we are only specifying free surface at even keel condition , can i know how to give the input.

Thank you.

planing hull

saji vf — Mon, 18 Dec 2023 08:47:51 GMT

Hello , we are doing a case on planing hull which contains a single step and interceptor, and when it comes to my issue is

1.when we keep the interceptor at the back of the transom trim will increase or decrease?

2. how to run a unsteady case of planing hull because i want to see the heave and pitch motion and how much time it will take for the simulation.

3. can we do a planing hull simulation without using savitsky method when we dont know our final trim .

thank you

Regarding the File size during the seakeeping simulation.

Halder — Tue, 22 Aug 2023 14:18:51 GMT

Dear Sir,
I am writing this email regarding the file size for the seakeeping simulation. Before starting the simulation, the file size is around 7GB. After the complete seakeeping simulation, the file size becomes 60-70 GB and more. Further, I decomposed the unsteady file around 120-130 files. The file size again increases. Therefore, I request you kindly guide me on how to reduce the file size.

With best regards,
Paresh Halder

Fine/Marine solver crash

Halder — Wed, 03 May 2023 14:21:43 GMT

Fine/Marine solver crash after running multiple simulations by using the delay option. kindly help me how to solve this issue.

Fine marine crash eveytime when I try to open it.

SURYA45 — Fri, 27 Jan 2023 10:53:22 GMT

Dear sir/madam,

I am Rohit and have Fine marine software but now it is not opening because for an unknown reason. whenever I click on the icon it opens for 2 sec and then closes automatically but where other tools like CFview and monitor open without any problem.

Please help me. Thank you for your time.

Have a great day.

Problem in Fine Marine Solver

Sakinah — Sun, 15 Jan 2023 04:05:51 GMT

Hi and good day Sir/Madam,

I am using Fine Marine to evaluate resistance, my problem is when I am running the simulation the solver keep crash, here i attach a picture so you can take a look. Hope i can here the solution from your team.

Thankyou in advance.
www.linkpicture.com/view.php

Problem in determining lift coefficient using Fine Marine

Marcar — Wed, 21 Dec 2022 15:10:37 GMT

Hello, I'm using fine marine for the analysis of 2D profiles at sea (for hydrofoils). I read the post of a few weeks ago (community.cadence.com/.../2d-simulations-of-hydrofoil-profiles), when I generate the domain, I set the dimension in z equal to 1 so that at the end of the simulation, having obtained the lift in the y direction, I use the lift formula Lift =1/2*rho*v^2*Cl*S, with S equal to 1*chord, to derive the Cl.
However, I noticed that if the domain in the z direction = 1 or equal to z = 0.1, the lift is the same. How is it possible?

Thanks in advance for the help.