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New Member
TommyK
Join Date: Oct 2021
Posts: 2
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Thanks to everyone who visited.
In short, I want to use other Arrhenius Equation. not provided by STAR-CCM+. In Star-CCM+, provided Arrhenius Equation is k = A*(T^b)*exp(-Ea/(Ru*T)) A : pre-exponent factor b : constant Ea : Activation Energy Ru : Universal Gas Constant T : Temperature But, I want to use Arrhenius Equation like k = A*([Co]^n) * exp(-Ea/(R*T)) A : pre-exponent factor [Co] : Concentration of Oxygen n : constant Ea : Activation Energy R : Universal Gas Constant T : Temperature In case of b = 1 & n = 1, Star-CCM+ equation looks like k = A*(T)*exp(-Ea/(Ru*T)) The equation what I want (from now on I call it B) looks like k = A*([Co]) * exp(-Ea/(R*T)) The Difference between Star-CCM+, B is only T/[Co] So I try to put A as field function A = constant(original b's constant) * ${MolarConcentrationO2} / (${Temperature}) But this method gives me error I attached error message as image. I thought the reason of this error is because of unit difference So I tried 1.8 * ${MolarConcentrationO2} / (${Temperature} * ${Transpose of T}) Transpose of T : 1/K But this gives me error too.. Is there any method to change Arrhenius Equation from STAR-CCM+ to B? |
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Tags |
arrhenius equation, field function, star-ccm+ |
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