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Using levelset method makes surface force to body force
Posted Aug 24, 2022, 2:52 a.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Microfluidics 0 Replies
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Hello! I am modeling two-phase flow, using the Laminar Flow-Level set interface, and want to simulate the behavior of droplet transport after adding surface forces. In the simulation, I hope to use the calculation method of surface tension in Levelset to convert the surface force into body force and bring it into the N-S equation for calculation. Therefore, after modifying the following formula of surface tension, use the variable form to insert the defined force F_S into the y direction of the body force.
force=0.000003[N/m]
f.coeff=6ls.rhoWls.philsReg(1-ls.philsReg)dlvo*tpf1.kappaLS
F_S=-f.coeffd(tpf1.phils,y)+ls.rhoWls.delta(tpf1.T_tensorxyd(dlvo,x)+tpf1.T_tensoryy*d(dlvo,y))
However, the simulation results show that the body force is only calculated on the initialized droplet interface, and it does not instantaneously track the droplet phase interface and calculate it like the surface tension.
Could you help me？Thanks！
Hello F Zhao
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