Mass Transfer at a suspended Sphere - Coupling of Convective and Diffusive Transfer
- November 30, 2014
- 2 replies
- 2320 views
Hey there,
I'm dealing with a problem concerning mass transfer at a porous solid sphere, suspended in a limited volume of water. I'm struggling to get the problem solved in MathCad. Perhaps has anyone an idea.
The problem is as follows. A solid sphere is suspended in an agitated tank. Mass Transfer is unsteady and described with Fick's 2nd law within the sphere. The flux at the surface is transfered to the bulk liquid by convection. Diffusive and convective flux is coupled at the phase boundary.
I tried to solve it by defining the mass balances in a solve block with pdesolve. Unfortunately there is an error concerning a mismatch of the initial conditions, which I cannot follow up. Actuallly I'm not sure if pdesolve is able to handle the problem. I really do appreciate your input.
Greetinx
Hank