Cell Info
 

hi,
plz tell me how can i get info about a cell, after meshing has been done.plz tell me as I am a beginner and using version 1.5 of OpenFoam

Hi, if you need information
 

Hi,

if you need information about your mesh without paraview you can use the "checkMesh".

Bye
Thomas

hi thnkx for ur advice, I h
 

hi

thnkx for ur advice, I have tried that,
i wanted info abt cells on a particular patch.
if u know then plz inform me.

hi if u know then plz tell
 

hi

if u know then plz tell me, how can i find magnitude of forces acting on a cell, in paraview or without it

Hi, a) in paraview there ar
 

Hi,

a) in paraview there are some filters to show the mesh quality also. If you need only a particular patch than switch off the other patchs...

http://paraview.org/OnlineHelpCurrent/MeshQuality.html

b) If there is not a special filter for your case about forces (magnitude). You also can try to use the "calculator" in paraview and write down your own equation.

http://paraview.org/OnlineHelpCurrent/Calculator.html

Bye
Thomas

hi Tian thnkx for ur advice
 

hi Tian

thnkx for ur advice
i will definetely try it

hi, when I use calculator f
 

hi,

when I use calculator following message is shown,
plz do tell me how to rectify it?

ERROR: In /home/dm2/henry/OpenFOAM/ThirdParty/ParaView3.3-cvs/VTK/Common/vtkFunctionParser .cxx, line 1473
vtkFunctionParser (0x1e229a0): Syntax error: expecting a variable name; see position 0

Hi, you make some misstake
 

Hi,

you make some misstake in equation...

Excample:

you got from your solultion Scalars:

X_Velocity
Y_Velocity
Z_Velocity

Calculator Magnitude: sqrt((X_VELOCITY^2)+(Y_VELOCITY^2)+(Z_VELOCITY^2))

Result Arry Name: Result

Change the Display to: "Result"

Bye
Thomas

can u plz tell me the equation
 

can u plz tell me the equation in right format, to find force on each cell

plz tell me equation for force
 

plz tell me equation for force on each cell in case of a lid driven cavity.

Hi, about forces have a loo
 

Hi,

about forces have a look here:

http://www.cfd-online.com/cgi-bin/Op...how.cgi?1/8402

it seems there are some utilities about forces in OF...

Bye
Thomas

hi Tian thnkx for ur advice,p
 

hi Tian
thnkx for ur advice,plz tell me for a lid driven cavity,for a particular patch e.g.moving wall how can i find the co-ordinates of face centre and the value of pressure at that point

Hi, if I remember well ther
 

Hi,

if I remember well there was some information about coordinates of face centre in the forum:

"
const vectorField& c = patch().Cf();

Now in variable c you have a vector of each face centre for all faces in your patch.

vectorField will give you a list of vectors for each face centre, each element of which contains the (x y z) coordinates.
"

About the pressure should be working similar...

Bye
Thomas

hello, plz tell me how to c
 

hello, plz tell me

how to calculate the force and moment on a patch or set of patches, e.g. to calculate the lift, drag and moment of an object in the flow.
how to calculate the normalised force and moment on a patch or set of patches, e.g. to calculate the lift, drag and moment coefficients of an object in the flow.

hi, thknx for advice, I cou
 

hi,

thknx for advice, I could find all parameters,
plz do tell how can i find area of a cell

Hi Mat, @ "area of a cell":
 

Hi Mat,

@ "area of a cell": This is not well defined.

Are you after the total area of all faces of a cell, the area of a specific face of a cell or a list of areas for all faces of a patch?

Henrik

hi Henrik I am after list of
 

hi Henrik
I am after list of areas for all faces of a patch.
if u know then plz tell me

Hi Mat, Sure! const scal
 

Hi Mat,

Sure!

const scalarField& area = patch().magSf();

Henrik

hi Henrik, plz tell me if t
 

hi Henrik,

plz tell me if there is any utility to find area of a patch(all cells in a patch)

Hi Mat! You could always ab
 

Hi Mat!

You could always abuse the patchIntegrate-utility. Set the boundary condition for some field on that patch to 1 and run the utility on it. The value of the integral should be the patch area.

Bernhard