[vitorspadeto]

Hi

I would to implement "timeVaryingUniformFixedValue" to my inlet pressure (b.c.). But "time" in the source code it seems in "1 2 3 4 5 6 ... ", that is, integer. But I need specify time varying pressure with decimals of seconds "1.0 1.1 1.2 1.3 1.4 1.5......2.0......3.0 3.1seconds" ... and should be polynomial/continuous curve. This is the graph:

PRESSURExTIME.jpg


on 0/p file, I believe it will be like it:

inlet
    {
        type timeVaryingUniformFixedValue;
        fileName "$FOAM_CASE/time-series";
        outOfBounds clamp;         
    }

and time-series would be like it:

(
(0 value1)
(1 value2)
(2 value3)
(3 value4)
...
)

question 1: How should I specify 0/p file correctly?
question 2: How should I specify "time-series" file to this graph?
question 3: After the program apply the complete sequence of values ​​"time-series", starts a new cycle reproducing the pulse pressure (cyclic process) again?


Best regards,
Vitor Spadeto Venturin

[maHein]

Hello,

"timeVaryingUniformFixedValue" was removed in OpenFOAM 2.1.0. However, a new boundary condition was introduced called "uniformFixedValue" (see http://www.openfoam.org/version2.1.0...conditions.php)

There is also the setting "outOfBounds" where you can define what happens when the simulation time is outside of your defined time values, for instance repeat or clamp.

Regards

[samiahmed]

Originally Posted by maHein

Hello,

"timeVaryingUniformFixedValue" was removed in OpenFOAM 2.1.0. However, a new boundary condition was introduced called "uniformFixedValue" (see http://www.openfoam.org/version2.1.0...conditions.php)

There is also the setting "outOfBounds" where you can define what happens when the simulation time is outside of your defined time values, for instance repeat or clamp.

Regards

I don't know why the timeVaryingUniformFixedValue still exist in this page.

[Michael@UW]

Originally Posted by samiahmed

I don't know why the timeVaryingUniformFixedValue still exist in this page.

I also wonder why these two boundary conditions both exist even in the latest version and what is the difference.

But I found timeVaryingUniformFixedValue works only for pointPatchFields, but uniformFixedValue works both for pointPatchFields and fvPatchFields.

Anyway, for pointPatchFields, we can use both. What's the difference?

timeVaryingUniformFixedValue
/home/michael/OpenFOAM/OpenFOAM-7/src/OpenFOAM/fields/pointPatchFields/derived/timeVaryingUniformFixedValue

uniformFixedValue
/home/michael/OpenFOAM/OpenFOAM-7/src/OpenFOAM/fields/pointPatchFields/derived/uniformFixedValue

uniformFixedValue
/home/michael/OpenFOAM/OpenFOAM-7/src/finiteVolume/fields/fvPatchFields/derived/uniformFixedValue