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Integration of Surface Flux During Simulation
Posted Sep 18, 2012, 3:03 p.m. EDT Chemical Reaction Engineering, Parameters, Variables, & Functions Version 4.2a 1 Reply
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Hello,
I am trying to model a heterogeneous reaction by specifying a Flux boundary condition that depends on the surface concentration, gamma, which changes with time: gamma(t) = gamma(t=0) - gamma_reacted(t). gamma_reacted(t) is just the integral from 0 to t of the surface flux. I see that the function timeint can only be evaluated after the simulation is finished, so I wanted to use a time discrete study and define gamma_reacted as a variable by adding timestep*flux to it at each step. Unfortunately I cannot define gamma_reacted = gamma_reacted + timestep*flux, but that is what I would like to do.
I am trying to model a heterogeneous reaction by specifying a Flux boundary condition that depends on the surface concentration, gamma, which changes with time: gamma(t) = gamma(t=0) - gamma_reacted(t). gamma_reacted(t) is just the integral from 0 to t of the surface flux. I see that the function timeint can only be evaluated after the simulation is finished, so I wanted to use a time discrete study and define gamma_reacted as a variable by adding timestep*flux to it at each step. Unfortunately I cannot define gamma_reacted = gamma_reacted + timestep*flux, but that is what I would like to do.
1 Reply Last Post Sep 20, 2012, 1:32 p.m. EDT