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Using a built in physics interface

Posted Feb 26, 2013, 5:23 a.m. EST 0 Replies

Rahul Kishor Semiconductors
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Hi All,

I have a modified equation for the fluid continuity equation based on the perturbation expansion. The modified eqn is:

d(rho_1)/dt + rho_0 * div (v_1) = 0 (also attached the eqn in the png file)....

so according to the equation we have two density variables .......where rho_0 is a constant.....

But in any fluid model in COMSOL the continuity equation is d(rho)/dt + rho * div (v_1) = 0 , where the density is the same for the first and second term of the equation......

Should I make use of the PDE interface to model this physics?

Could someone please help me with this.

Thanks in advance

Regards,
Rahul Kishor
0 Replies Last Post Feb 26, 2013, 5:23 a.m. EST
COMSOL Moderator

Hello Rahul Kishor

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