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All about the PIMPLE algorithm - Part II

Posted October 21, 2014 at 18:55 by Tobi
Updated November 4, 2014 at 14:36 by Tobi (Some errors and mistakes)

## Case 3.1 ##

Now we will use the following fvSolution file:
Code:
PIMPLE
{
    nCorrectors            1;
    nOuterCorrectors    2;
}
Compared to Case 2 there is not a big difference. The only difference is that we calculate the pressure - momentum coupling in one time step twice:
  1. Calculate momentum
  2. Calculate pressure
  3. Recalculate momentum from new pressure
  4. Recalculate pressure from new momentum
Calculation in OpenFOAM is like:...
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Old

All about the PIMPLE algorithm - Part I

Posted October 21, 2014 at 18:54 by Tobi
Updated October 22, 2014 at 09:25 by Tobi

#### Storyboard ####

First I wanted to write a nice story like »Ignaz« but that would only copy the good attention of the author and of course I am not a good story-teller. Therefor I will go directly to the topic and will tell you how the PIMPLE algorithm is working in OpenFOAM, how to set up the keywords and which abilities you have to control the algorithm. The test case it the pitzDaily case in the pimpleFoam folder of incompressible fluids. Only the courant number was decreased...
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Old

useful udf ! thanks to macfly

Posted October 21, 2014 at 18:33 by diamondx

#include "udf.h"
real T_mean; /* defined outside because will be used in multiple DEFINE macros */

DEFINE_ADJUST(adjust, domain, t)
{
real T_tot;
real u;
real counter = 0;

face_t f;
int ID = 20; /* outlet ID displayed in Fluent boundary conditions panel */
Thread *thread;
thread = Lookup_Thread(domain, ID);
begin_f_loop(f, thread)
{
u = F_U(f, thread); /* x velocity...
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Old

Prism layers at airfoil using shappyHexMesh

Posted October 20, 2014 at 06:58 by skeptik (CFD notes)

Hard work with stupid snappyHexMeshDict bruteforcing and i have a result

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Old

2 blade model NACA23015

Posted October 1, 2014 at 06:49 by skeptik (CFD notes)

Seems to be true,
My polyMesh test.

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