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Checking continuity equation

Posted Mar 17, 2014, 6:48 p.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.3b 0 Replies

Viviana Palacio Betancur
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Hello,

I'm currently modeling incompressible flow with the Navier-Stokes equations in a Y-shaped pipe with newtonian properties (a fluid similar to water). My problem emerges when I try to check the continuity equation -> div u = 0. I export the data for the first derivatives ( du/dx, dv/dy, and dw/dz) and for each node the sum should be near 0 but it gives a value of the 10^2 order.

Is there something failing with COMSOL? Or did I defined something wrong? Am I exporting the correct data?

Thank you!
0 Replies Last Post Mar 17, 2014, 6:48 p.m. EDT
COMSOL Moderator

Hello Viviana Palacio Betancur

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