Time step in two-phase flow simulations

hnemati · May 18, 2018, 06:14

Dear all
I am doing DNS of turbulent bubbly flows using CLSVOF. I just realized that by increasing the density ratio, the time step decrease proportionally. Can someone tell me the reason?
Thank you

piu58 · May 18, 2018, 10:30

Quote:

Originally Posted by hnemati

Dear all
I am doing DNS of turbulent bubbly flows using CLSVOF. I just realized that by increasing the density ratio, the time step decrease proportionally. Can someone tell me the reason?
Thank you

You need both, a spatial and a temporal resolution. If you increase the one you have to increase the other too, to get a better accuracy of the result.

May 18, 2018, 06:14	Time step in two-phase flow simulations	#1
hnemati Member SAM Join Date: Apr 2012 Posts: 74 Rep Power: 13	Dear all I am doing DNS of turbulent bubbly flows using CLSVOF. I just realized that by increasing the density ratio, the time step decrease proportionally. Can someone tell me the reason? Thank you

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