|
[Sponsors] |
May 14, 2013, 10:50 |
Anti-Ventilation Method
|
#1 |
New Member
Daniele
Join Date: Feb 2013
Posts: 2
Rep Power: 0 |
Hi,
I'm simulating a planing hull by ccm+ at about Fn=1.2. By the volume fraction of water I found a little quantity of air below the hull. This phenomenon induces also wrong trim and resistance value. I heard about an anti-ventilation method used to correct the drag value deducting, from some cells (only the cells that have less of 50% of water), a small percentage of air. I try this method but I found some difficult to apply it. I write a custom field function called "zone" that compute the volume from which deduct air. ($WallDistance > .003)?0 : (($VolumeFractionWater < .5)?0 : 1) Then I write a function called "airsource" by which is possible deduct air: $VolumeFractionAIR*$zone / -.03 The problem is: I'm not able to compute the new drag considering that deduction. Could you help me? Thanks |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[Gmsh] discretizer - gmshToFoam | Andyjoe | OpenFOAM Meshing & Mesh Conversion | 13 | March 14, 2012 04:35 |
Fluent 6.3.26 vs 12.1 and partition method | Anorky | FLUENT | 0 | April 27, 2010 10:55 |
Code for most powerfull FDV Method | D.S.Nasan | Main CFD Forum | 6 | September 4, 2008 02:08 |
Help about the preconditioner in gmres method | Dan Gao | Main CFD Forum | 3 | July 5, 2008 01:18 |
hess-smith method and fvm method | yangqing | FLUENT | 0 | March 20, 2002 19:25 |