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user subroutine SORSCA

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Old   November 15, 2002, 06:45
Default user subroutine SORSCA
  #1
Antonio Andreini
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Hi

Does anybody know how to pass to STAR a chemical specie source term via SORSCA subroutine? Which is the right way to express source term by the means of S1P, S2P terms required by SORSCA in order to have:

SOURCE = S1P - S2P*SCALAR

Thanks in advance
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Old   November 18, 2002, 03:07
Default Re: user subroutine SORSCA
  #2
Ossi
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S1P can be given as such. S2P is given as a positive number (Star takes care of the negative sign) and without the scalar that is considered (again, Star multiplies S2P with the scalar which will have the source term)
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Old   November 18, 2002, 04:36
Default Re: user subroutine SORSCA
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Antonio Andreini
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Thanks Ossi

But I want to know which is the best way to decompose my source term (generally called Wk) in order to transform it in th form required by STAR. In other word which is the relationship between the source term Wk (evaluated with an external model) and the two parameters S1P e S2P?

Thanks in advance
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Old   November 18, 2002, 04:45
Default Re: user subroutine SORSCA
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Ossi
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You have to linearize you source term. Usuallu S1P is the constant term and S2P is depending on the scalar that is considered.
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Old   November 18, 2002, 07:56
Default Re: user subroutine SORSCA
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Antonio Andreini
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Dear Ossi

Linearization of my soruce term is not easy... May I use its logical definition?

Wk = dYk / dt

Thanks
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