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TimeVaryingMappedFixedValue

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Old   February 10, 2011, 09:00
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Hello everybody,

my question would be whether it is possible with timeVarryingMappedFixedValue to map solutions from another simulation to the inlet of a new one.

in my case I have different velocity profiles at the outlet of a simple tube (because of an oscillating pressure gradient) and I want to use those U-profiles for a lot of time directories at the inlet of another gemetrie e.g. 0,0.001,0.002,0.003,....

is there a way to achieve this?
greets
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Old   August 17, 2011, 10:14
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Markus Rehm
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Hello,

I successfully used timeVaryingMappedFixedValue but checking the inlet patch I observed that a few faces did not obtain the right values. I added two pictures to illustrate the problem. Any suggestions to get rid of the problem?

Markus
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Old   December 19, 2012, 11:09
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Dr Sachin Borse
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dear All
how to specify k, epsilon and u boundary condition for timeVaryingMappedFixedValue for inlet. Please answer...
Dr Borse
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Old   December 19, 2012, 11:13
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Dr Sachin Borse
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timeVaryingMappedFixedValue.
How to specify boundary condition for k, epsilon and U for timeVaryingMappedFixedValue....I am not able to generate k, epsilon, U fields from already existing boundary fIELDS..
dr borse
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Old   August 27, 2013, 17:41
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hello everybody,

I'm trying to understand how the pitzDailyExptInlet tutorial (employing timeVaryingMappedFixdValue patch type) works.

I mean, apart from the files points (70 values) and U, k, epsilon (70 values) in boundaryData directory, why does it need nonUniform lists of values (30 values) at inlet for k and epsilon in 0 directory?
why 30 values?
why not a list for 0/U too?

I'm using timeVaryingMappedFixedValue patch at inlet in a channel flow, which uses as inlet boundary condition fields sampled at a certain section of a "preliminar channel flow".
I would like to know if it is sufficient to create a boundaryData directory with points and field files obtained with the sample utility, or if it is needed to include a list of values (how many values?!) in 0/U,p,....

thank you very much in advance
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Old   May 26, 2014, 09:20
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Quote:
Originally Posted by markusrehm View Post
Hello,

I successfully used timeVaryingMappedFixedValue but checking the inlet patch I observed that a few faces did not obtain the right values. I added two pictures to illustrate the problem. Any suggestions to get rid of the problem?

Markus
Hallo Markus,

I also have the same problem with you. I have more points without right values. Did you figure it out?
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Old   July 24, 2014, 04:30
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Albrecht vBoetticher
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Hello,
considering faces that have not the right values: I don't know why but it might help to consider how the geometry is evaluated. We discussed the BC at the OF Stammtisch Zürich and based on boundaryData/PATCH/points, the first point of the file is taken (p1) and a search for the farthest point from p1 is done to gian p2. Then a search is done for the point that is farthest from p2-p1 (=p3). Then a linear interpolation for every face center of the chosen patch is performed, weighted to 3 vertices. So, maybe resorting the point file might solve it?
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Old   March 24, 2015, 06:43
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Hello,

I am also interested in this kind of BC in OF now. In the tutorial simpleFoam/pitzDailyExptInlet/, we have the constant/boundaryData/inlet/points, and there are two parts of the point coordinates: min z and max z.

For max z, why the z coordinate is 0.173. I plot out the geometry using paraview, actually the z is from -0.0005 to 0.0005. So the zmin and zmax for the points on the inlet should be -0.0005 and 0.0005, respectively. What is the problem for my above understanding? Thank you so much.


Quote:
Originally Posted by irishdave View Post
Hello,

I have been looking at the timeVaryingMappedFixedValue fvPatch. I am currently making a program that will be used to create inlet data. This patch looks to be the perfect solution in order to use the created data within a case. My question is where can I find more documentation on the patch? I want to be able to create the constant/boundaryData/inlet files.

What is contained in the points file and is there an easy way to create one?

Why for the tutorial case simpleFoam/pitzDailyExptInlet/ which uses the BC do the files contain 70 values when the fvPatch faceCells() function returns 30 cells for the case?

I am currently trying to implement a inflow data generator for OpenFOAM which upon completion will be made available open-source to the OpenFOAM community.

Thanks
David
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Old   May 28, 2015, 13:37
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Hi all,
I'am using OpenFOAM 2.3.0 and want to use the timeVaryingMappedFixedValue condition to control my inlet pressures on the boundary.My question is, how do I extract the points on the inlet surface to include in the points file in the constant/boundaryData/inlet folder?

I'am sorry if this has a fairly obvious answer, I started using OpenFOAM only the past month.
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