CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Flow simulation of a marine propeller

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   April 12, 2013, 03:19
Default Flow simulation of a marine propeller
New Member
Rohit Tripathy
Join Date: Apr 2013
Location: Vellore , India
Posts: 6
Rep Power: 4
Rohit Tripathy is on a distinguished road
Hi ,
I am new to CFD . I am currently working on a project that involves study of the cavitation phenomenon in a marine propeller which would require the simulation to be performed using multiphase flow. I am using ANSYS Fluent 12.0.16. Could someone please guide me on how to perform a multiphase flow simulation in Fluent ? Any help would be highly appreciated.
Rohit Tripathy is offline   Reply With Quote

Old   April 12, 2013, 03:28
Senior Member
ghost82's Avatar
Join Date: Oct 2010
Location: Italy
Posts: 949
Rep Power: 15
ghost82 will become famous soon enough
Hi your problem is not very simple; I'm performing some cavitation simulation on fixed object and here is what I can recommend to you:

- use the mixture model with cavitation model enabled; to use the full Singhal et al model, in newer version of fluent, you have to activate it from the command window, digiting yes when asking to use the Singhal et al model: solve/set/expert

- You can use rotating reference frame or sliding mesh: second one method is more expensive in terms of calculations

- Check your mesh to be an high quality mesh, possibly structured

- You could need to write some udf to adjust results: turbulent viscosity, compressiblity of liquid medium, custom cavitational model, etc.

- Start from simple case, without enabling cavitation, then once you reached a converged solution enable cavitation

- Use first first order discretization scheme, then try to switch to higher oders.

These are only preliminary advices, good luck my friend!

ghost82 is offline   Reply With Quote

Old   October 1, 2013, 10:48
Default Cavitation simulation steps on Fluent
New Member
Join Date: Sep 2011
Location: Algeria
Posts: 11
Rep Power: 6
samir_cfd is on a distinguished road
Send a message via MSN to samir_cfd Send a message via Skype™ to samir_cfd
Hello Mr Daniel !!

Please I am simulating cavitation of 5 bladed marine propeller using Ansys Fluent,

I am new in simulating multiphase flow, and i need if it is possible steps to simulate cavitation using Fluent

Best regards

samir_cfd is offline   Reply With Quote

Old   October 2, 2013, 09:51
Senior Member
ghost82's Avatar
Join Date: Oct 2010
Location: Italy
Posts: 949
Rep Power: 15
ghost82 will become famous soon enough
I think you can read some tutorials about sliding meshes, mrf and cavitation.
search on google, there are some pdf tutorials to understand what you should do.

ghost82 is offline   Reply With Quote

Old   October 5, 2013, 14:29
Join Date: Sep 2011
Posts: 35
Rep Power: 6 is on a distinguished road
This is an example of cavitation around a hydrofoil:

Join Us on Facebook is offline   Reply With Quote

Old   October 7, 2013, 16:41
Smile wind turbine
New Member
Join Date: Dec 2011
Posts: 15
Rep Power: 5
drsattar is on a distinguished road
Hi for all
I am trying to simulate 5 MW offshore wind turbine (aerodynamics study only) using CFX to validate my results which were coming from another solver, under these conditions
Full scale of 5 MW offshore wind turbine dimensions
transient analysis
Inlet velocity = 9 m/sec
3 blade rotor + hub (rotating domain) with angular velocity =1.08 rad/sec
Nacelle + tower (stationary domain)
Then, three interfaces have been defined between the stationary domain and the rotating domain due to changes in reference frames. In order to rotate the rotor in ANSYS.
I create appropriate and suitable meshes for all the parts in ICEM and CFX is specifying domains, boundary conditions, type of analysis, interfaces, etc.

But I always I find this error

First side of interface |
| Domain Interface 1 |
| seems to contain a vertex at R=0 (Rmin/Rrange < GGI ETA TOLERANCE).|
| This is not supported with |
| PITCH CHANGE/Option = Automatic |
| Please use |
| PITCH CHANGE/Option = None |
| instead. |
| ********* WARNING ********* |
| Coordinate transformation of interface |
| Domain Interface 2 |
| into a radial interface resulted in some faces with a very small |
| axial extent. There are two possible reasons for this: |
| 1. The interface contains axial faces (normal to the axis). |
| If this is the case, please split the interface into two parts, |
| so that the purely axial sections could be transformed |
| properly. The transformation type (axial or radial) is chosen |
| automatically based on the largest interface extent. |
| 2. This message may be generated because of a tolerancing issue |
| when the mesh resolution in the axial direction is very |
| small (e.g. at the hub or shroud). If this is the case, you |
| may ignore this message. |
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| ****** FATAL ERROR ****** The orthographic view transformation fa- |
| iled on domain interface "Domain Interface 2". Failure may be du- |
| e to r=0 included in transformed cylindrical coordinates of an in- |
| terface with rotational relative motion. Another reason could be |
| that the interface contains faces that are parallel and others t- |
| hat are perpendicular to the rotation axis. |


When I selected (PITCH CHANGE/Option = Automatic ) which I thought is correct chose but the above error will appear
And when I selected (PITCH CHANGE/Option = None) the run continue and complete, everything is ok, but the values of torque is negative ???
Attached Images
File Type: jpg Screenshot.jpg (72.1 KB, 27 views)
drsattar is offline   Reply With Quote

Old   April 3, 2015, 07:51
New Member
Manoj Jadhav
Join Date: Jan 2015
Location: Vellore
Posts: 1
Rep Power: 0
mkjadhav is on a distinguished road
Hi Sattar,

I am doing flow analysis of radial turbine in CFX. I encountered same error as you mentioned above.
Whether you got solution for that?
Please reply as soon as possible.
mkjadhav is offline   Reply With Quote


cavitation, fluent 12, marine-impeller-mixing, multiphase flow, propeller

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Differences and functions of Solidworks Simulation and Solidworks Flow Simulation? alpharays Main CFD Forum 0 April 19, 2012 03:13
Propeller flow simulation jun005 Main CFD Forum 0 August 5, 2009 02:10
Propeller Fan Curve Simulation Teng_YJ FLUENT 2 February 16, 2009 20:37
Help with slug flow simulation. Kes FLUENT 2 May 27, 2008 04:48
Expert parameter to stop the fluid flow simulation KK CFX 1 February 25, 2008 17:29

All times are GMT -4. The time now is 09:34.