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How to deal with the flow field and get the pressure drop in magnetorheological fluid valve mode?
Posted Jul 17, 2015, 5:10 a.m. EDT Low-Frequency Electromagnetics, Fluid & Heat, Computational Fluid Dynamics (CFD), Studies & Solvers 0 Replies
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Everyone.
Attached is a simple magnetorheological fluid valve model (Comsol 3.5a) with an uniform magnetic field (already obtained), but the errors occured as follows when the flow field was simulated.
Error:
Failed to find a solution:
No convergence, even when using the minimum damping factor.
Returned solution has not converged.
It is also known that magnetorheological fluid shows a good sealing performance in valve mode, and the pressure drop can be expressed as:
ΔP=12Ηql/(g^3w)+fτ(H)L/g
where η is the dynamic viscosity, Q is the flow rate, L ,w, g is the geometric length, width and gap size of the flow channel, τ(H) is the yield stress developed in response to the applied magnetic field, and the other factor f is an empirical factor and is determined experimentally.
And how to get the pressure drop ΔP by simulating the model?
Your suggestions are highly appreciated!
--
Zhou Hongliang
Attachments:
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