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Old   January 19, 2009, 00:20
Default hi, plz tell me how can i get
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Mat
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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
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Old   January 19, 2009, 01:34
Default Hi, if you need information
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Hi,

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

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Old   January 19, 2009, 01:47
Default hi thnkx for ur advice, I h
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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.
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Old   January 19, 2009, 02:07
Default hi if u know then plz tell
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hi

if u know then plz tell me, how can i find magnitude of forces acting on a cell, in paraview or without it
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Old   January 19, 2009, 03:14
Default Hi, a) in paraview there ar
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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

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Old   January 19, 2009, 03:47
Default hi Tian thnkx for ur advice
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hi Tian

thnkx for ur advice
i will definetely try it
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Old   January 19, 2009, 04:32
Default hi, when I use calculator f
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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
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Old   January 19, 2009, 05:02
Default Hi, you make some misstake
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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"

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Old   January 19, 2009, 05:30
Default can u plz tell me the equation
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can u plz tell me the equation in right format, to find force on each cell
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Old   January 19, 2009, 06:28
Default plz tell me equation for force
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plz tell me equation for force on each cell in case of a lid driven cavity.
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Old   January 19, 2009, 07:24
Default Hi, about forces have a loo
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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...

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Old   January 20, 2009, 04:00
Default hi Tian thnkx for ur advice,p
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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
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Old   January 20, 2009, 04:10
Default Hi, if I remember well ther
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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...

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Old   January 20, 2009, 06:10
Default hello, plz tell me how to c
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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.
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Old   January 21, 2009, 02:10
Default hi, thknx for advice, I cou
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hi,

thknx for advice, I could find all parameters,
plz do tell how can i find area of a cell
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Old   January 21, 2009, 03:07
Default Hi Mat, @ "area of a cell":
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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?

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Old   January 21, 2009, 03:12
Default hi Henrik I am after list of
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hi Henrik
I am after list of areas for all faces of a patch.
if u know then plz tell me
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Old   January 21, 2009, 04:26
Default Hi Mat, Sure! const scal
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Hi Mat,

Sure!

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

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Old   January 21, 2009, 07:48
Default hi Henrik, plz tell me if t
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hi Henrik,

plz tell me if there is any utility to find area of a patch(all cells in a patch)
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Old   January 22, 2009, 16:26
Default Hi Mat! You could always ab
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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.

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