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problem using matlab functions with comsol
Posted Apr 5, 2011, 6:12 a.m. EDT Interfacing, Structural Mechanics 0 Replies
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To present quickly my problem, I work on a 2D wall for which I study mass and heat transfers and I particularly interest myself on the phenomenon of hysteresis. To model this last one, I have to introduce the expression of the water content w : w=wR+(wS-wR)*(1+abs(alpha*R*Tref*log(HR)/(M*g))^eta)^(-m)
Tref, R, M and g are constants.
alpha, m, eta, wR and wS are 5 functions created under matlab which depend on 3 paramaters : HR the relative humidity which is a dependant variable, x and t.
Taken independently the 5 functions give me a correct answer for external solicitations after a comsol run. Moreover, the values taken by the expression of w and its derivative seem correct too. The main issue is that after the comsol run, HR, the relative humidity is not coherent at all.
Do you know from where it comes? Is it because my input and output dimensions are not the same? Is it a matlab problem or a comsol problem? If you want I can sent you my m- and mph-files the next time.
Best Regards
Yacine Ait Oumeziane
Hello Yacine Ait Ouméziane
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