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Two Stream Simulation

Posted Jul 15, 2015, 3:26 p.m. EDT Fluid & Heat, Geometry, Mesh, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 5.1 0 Replies

Ezekiel Yorke
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Hey, everyone. I've been using COMSOL for about 2 weeks now and needed mostly to teach myself how to use it *for summer research*. I'm having trouble running this simulation that's attached. The research is based on fluid behavior within the heart as it regurgitates back into the left atrium chamber from the valves, which are represented by the cone shaped-like piece at the bottom of the model.

Running the simulation with just one fluid is simple. But I'd like to simulate two different fluids of different viscous values to show the viscous effects closer to the chamber walls. To properly understand how to use two different fluids, i'm using water and transformer oil for now, before becoming more complicated. However, even so, when running the study, it isn't converging. I tried changing the size of the mesh but to no avail. It would be great if i could get some advice for this. I also used the same two fluids with different geometry *a more basic 2D dimensional instead of 2D axisymmetrical* and it worked. So I'm quite unsure as to what I'm doing wrong in the First attached file.

Respectfully,
Ezekiel.
0 Replies Last Post Jul 15, 2015, 3:26 p.m. EDT
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Hello Ezekiel Yorke

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