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How to get the total amount out of the domain for this transient diffusion?
Posted 2010年10月20日 GMT-4 20:53 0 Replies
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The geometry is a rectangle
governing equation: Fick’s second law
boundary condition: Boundary 1. Concentration changing with time, Boundary 2. symmetry, Boundary 3. 4 No flux
I want to obtain the total amount of the species out of the domain in the r direction at the boundary 1 during the time
My steps are like this:(Comsol 4.0)
1. Model 1 ---- Definitions ---- Integration 1: Operator name = intop1, Geometric entity level = Boundary, Selection = Boundary 1
2. Model 1 ---- ODEs and DAEs ---- Global Equations 1: Name = Nw, Equation = Nwt – intop1(chds. tfluxr_C)
Nw is the total amount out of the domain during the time
Am I right?
Hello Xiaoyi Yu
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