[sajjjad]

hi
I simulate transient flow around of the propeller(pimpleDymFoam) and compare with steady data.
my result Component velocity on the slice blade so different with
Experimental results( Experimental results is steady state).


i use average-field for this.
clip/clip/slice/plotintersictioncurve/ U_xmean ,U_ymean... so different

Somebody has an idea.

thank you.
sajjad
/* fieldAverage1
{
type fieldAverage;
functionObjectLibs ( "libfieldFunctionObjects.so" );
enabled false;
outputControl outputTime;

fields
(
U
{
mean on;
prime2Mean on;
base time;
}

p
{
mean on;
prime2Mean on;
base time;

[sajjjad]

hi my friends

I think the fieldAverage code is based on the location and not the cell's index. That is, the mean values do not fluctuate with the propeller and are specific to the same place
how can use average field on dynamic mesh??????????



thank you

sajjad

[kandelabr]

You can specify surfaceFieldValue on a patch:

type surfaceFieldValue;
operation average;
fields (p);
writeFields no;
regionType patch;
name blade;

[sajjjad]

Originally Posted by kandelabr

You can specify surfaceFieldValue on a patch:

type surfaceFieldValue;
operation average;
fields (p);
writeFields no;
regionType patch;
name blade;

hi
thank Nejc for ripely.I'm sorry. i explain my problem Incomplete.
i want average not on the blade.in fact on the slice radial(such this picture)


sajjad
thank you.

[wyldckat]

Since I couldn't find a thread on this, I'm post here the answer to the following PM from sajjjad:

Originally Posted by sajjjad

hi Bruno
what is Axial and tangentialand radius speed in the propeller?
thank you.
sajjad

Quick answer:

1. Quoting here: https://pingpong.chalmers.se/public/...ingOFW11-1.pdf
   

   The convertToCylindrical utility
   Converts U to Urel. Note that Z-axis must be the center axis of rotation, but you can easily make it general with the cylindricalCS class in $FOAM_SRC/OpenFOAM/coordinateSystems

2. A few more details about the utility: https://openfoamwiki.net/index.php/S...tem_Converters
3. There is a somewhat more recent version of this utility here: https://github.com/engenegr/convertToCylindrical