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Old   March 28, 2008, 12:57
Default Just to close the issue I brou
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Kevin Smith
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Just to close the issue I brought up a few posts ago - turns out I made a mistake somewhere along the way and I have it working now in parallel. I simply went back through the process of grid generation, case setup, etc and got it to work.
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Old   October 8, 2008, 09:53
Default dear all, i am a new user o
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klaus drohme
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dear all,

i am a new user of OF-1.5 and have a problem with moveMesh; i tried to move two points of a cuboid along the edges such that the cuboid becomes a wedge. actually it is a small moving patch not only two points.
unfortunately the site/patch of the cuboit which inclines doesn´t stay planar.(patch type slip)
i tried many different options of the moveMesh untility and always the inclining patch deforms... anyone an idea?
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Old   November 1, 2008, 11:43
Default I am currently use OpenFOAM1.5
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Peter Lian
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I am currently use OpenFOAM1.5 and try to simulate an oscillating airfoil. My first step is to simulate a square moving with constant velocity [1 1 0].

I made some changes based on the example from the tutorial. However, I can only specify the x-velocity in the pointMotionUx and cellMotionUx.

I try to change the class from pointScalarField to pointVectorField, but the code does not recognize the definition.

The questions are:

1: How should a velocity [1 1 0] be specified?
2: what are the functions of pointMotionUx and cellMotionUx.

Thanks.

Peter
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Old   November 12, 2008, 17:03
Default Hi Peter, 1. change dynamic
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Louis Gagnon
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Hi Peter,

1. change dynamicMeshDict definition to "solver velocityLaplacian;" and rename *MotionUx to *MotionU changing their content to vectors

2. fixedValue, timeVaryingFixedValue, slip, symmetry, (I have not yet been able to get oscillatingFixedValue to work with OF 1.5)

have a good afternoon,

-Louis
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Old   November 12, 2008, 17:26
Default Thanks, Louis. I am able to
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Peter Lian
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Thanks, Louis.

I am able to run the fixedValue. Just like you, the oscillatingFixedValue does not work with OF1.5. From a post under other thread it seems that bc work with OF1.4-dev. The warning message indicates that it is not implemented in OF1.5.

With OF1.4, the file is located in
src/OpenFOAM/fields/pointPatchFields/derived

now it is at
src/finiteVolume/fields/fvPatchFields/derived/

Humm... ???

Peter
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Old   November 12, 2008, 17:55
Default Hi again Peter, I suppose y
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Louis Gagnon
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Hi again Peter,

I suppose you could always define the almost exact same condition as oscillatinFixedValue using a timeVaryingFixedValue condition (especially if you are working with a constant timestep) by using a home-made piece of code to generate the "*.dat" file that defines the mesh motion.

-Louis
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Old   November 12, 2008, 18:26
Default Louis, Thanks again. It w
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Peter Lian
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Louis,

Thanks again. It works. I also find this link discussing the unsteady bc. http://albertopassalacqua.com/?p=69#comment-209

Still do not understand why the oscillatingFixedValue does not work. It is under the same directory.

Peter
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Old   February 25, 2010, 17:11
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Ruben Paredes
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Hi there,

I am new to OpenFOAM and I am trying to simulate an oscillating cylinder. Only in the case that someone is looking for another option to simulate oscillating motion. I specified my moving BC as oscillatingVelocity type in the pointMotionU file.

Ruben
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Old   December 3, 2010, 18:13
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Daniel WEI (老魏)
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Hi,

It seems to be a bug, during RBF interpolating, the LUdecompose met a singular matrix.
The RBF works good for serial, but the parallel run fails. Could anyone helps me on this?

Later I found in file "RBFMotionSolver.C", line
Code:
    Info << "Total points on moving boundaries: " << nMarkedPoints << endl;
Code:
    Info << "Total points on static boundaries: " << nMarkedPoints << endl;
Code:
    Info << "Number of internal points: " << nMarkedPoints << endl;
It seem it just outputs one processor's number, could it be possible to output the whole information?

And how to do LUdecompose on the whole mesh points, not just one processor?


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Old   December 14, 2010, 07:20
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Daniele
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hi
Can (and How) I use update.mesh to modify a patch of a mesh? I have a rectangular box, and I would update bottom with a new shape, Can I do to solve this problem?

Thanks
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