|
[Sponsors] |
November 13, 2008, 19:24 |
Flow around ship
|
#1 |
Guest
Posts: n/a
|
I'm trying to simulate flow around a ship hull to calculate skin friction resistance, viscous pressure resistance, and wave making resistance using CFX. How can I get the value of wave making resistance, viscous pressure resistance, and skin friction resistance from the post processor of CFX ?. How to calculate them individually ?. How about drag force in CFX, Is it wave making resistance,or viscous resistance, or skin friction resistance ? Thank you very much for everyone in this forum.
|
|
November 16, 2008, 16:43 |
Re: Flow around ship
|
#2 |
Guest
Posts: n/a
|
You get the total drag as the force_x() function on your hull surface (if the ship is travelling in the X direction)
You can't really as far as I know separate out the wave resistance. To separate viscous and pressure drag you have to look at the monitor output at the end of the simulation, where the report will include those numbers. I have not found any readymade CEL function to separate those, although you could calculate them using the integration functions in CEL. It is a good idea to monitor force_x@hull during the simulation to make shure you have convergence. This type of simulation converges very slowly. I typically run about 100hrs wall clock time on a 20 core cluster with a 6M element mesh to get wavfe pattern convergence. |
|
November 16, 2008, 20:56 |
Re: Flow around ship (To Mr/Mrs Chebeba)
|
#3 |
Guest
Posts: n/a
|
Thank for your information. If you don't mind please send me tutorial how to modelling flow around ship to my email address at c.mocca@yahoo.co.uk. I'm so thankful for your information.
|
|
September 18, 2011, 10:30 |
|
#4 |
New Member
M.Khabir
Join Date: Jun 2010
Posts: 5
Rep Power: 15 |
hi
it is easy... by these step... 1. solid your ship and insert into CFX (modeler) 2. make your domain and subtract your ship from domain 3. make imperial face (by extrude a line for a face by type imperial ) 4. make your mesh (automatic) 5. illustrate inlet,out let flow and wall and run have a best day |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Flow meter Design | CD adapco Group Marketing | Siemens | 3 | June 21, 2011 08:33 |
Flow past a ship model | Ankur Srivastava | Siemens | 6 | November 4, 2008 04:02 |
Mass flow and U-Mom flow in CFX | Zhihua Xie | CFX | 0 | September 3, 2007 09:49 |
transform navier-stokes eq. to euler-eq. | pxyz | Main CFD Forum | 37 | July 7, 2006 08:42 |
Meshing ship flow with Hex??? | Boris | FLUENT | 5 | July 17, 2002 16:47 |