Coordinate system definition in porous zones

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 June 14, 2015, 17:30 Coordinate system definition in porous zones #1 New Member   Join Date: Jun 2015 Posts: 1 Rep Power: 0 Hi, I'm new with openFOAM and cfd . As assignment for a university course, I should simulate a DOC-DPF system (teacher gave me a tutorial). I have set the porous zone in that way: porosity1 { type DarcyForchheimer; active yes; cellZone catZoneCells; DarcyForchheimerCoeffs { d d [0 -2 0 0 0 0 0] (2e8 1e8 1e8); f f [0 -1 0 0 0 0 0] (0 0 0); coordinateSystem { e1 (0.866 0.5 0); // asse cilindro e2 (0 0 1); // ortogonale a e1 } } } I did not completely understand the meaning of e1 and e2. I think these unitary vectors are the local coordinate system of the zone, but how can I set the origin of the system? What is the kind of relation they have with the global system? Thanks to all! Best regards, Matteo. mizzou likes this.

October 9, 2016, 17:18
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 Originally Posted by mp001 Hi, I'm new with openFOAM and cfd . As assignment for a university course, I should simulate a DOC-DPF system (teacher gave me a tutorial). I have set the porous zone in that way: porosity1 { type DarcyForchheimer; active yes; cellZone catZoneCells; DarcyForchheimerCoeffs { d d [0 -2 0 0 0 0 0] (2e8 1e8 1e8); f f [0 -1 0 0 0 0 0] (0 0 0); coordinateSystem { e1 (0.866 0.5 0); // asse cilindro e2 (0 0 1); // ortogonale a e1 } } } I did not completely understand the meaning of e1 and e2. I think these unitary vectors are the local coordinate system of the zone, but how can I set the origin of the system? What is the kind of relation they have with the global system? Thanks to all! Best regards, Matteo.
I also have the same question. Anybody have any idea to clarify the problem?

Thank you,

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