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Relative residual is greater than the relative error

Posted 18.07.2010, 13:57 GMT-4 1 Reply

Abhirup Roy Choudhury
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I am working on the flow simulation of blood in the non-Newtonian flow section of the Chemical Engineering module in COMSOL Multiphysics version 3.5a. I am using power-law fluids. However as I vary the value of n,the following error message appears in some cases: "Relative residual is greater than the relative tolerance " Even if I increase the value of the relative tolerance in the solver parameters settings, the error refuses to go. Please help. I am stuck.
1 Reply Last Post 17.07.2011, 18:27 GMT-4
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Hello Abhirup Roy Choudhury

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Narasimha Nagaiah
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Posted: 1 decade ago 17.07.2011, 18:27 GMT-4
I'm also stuck there, but some times it will give you answer if you fine tune the mesh at critical points (incresase elements) and try reducing velocity.
I'm also stuck there, but some times it will give you answer if you fine tune the mesh at critical points (incresase elements) and try reducing velocity.

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