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February 9, 2015, 02:22
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problem with periodic BC
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Member
joseph
Join Date: Jan 2015
Posts: 32
Rep Power: 12  |
hi friends, when i applied periodic BC at the inlet and outlet of a 2D unitcell of a microchannel with specified mass flow rate, i got a seemingly unphysical pressure variation along the centre line with negative pressure towards the downstream end. But when i avoid the periodic BC and arrange unitcells in series with velocity inlet and pressure outlet BCs i get finite pressure drop. Why the periodic BC is not working? why the negative pressure? can you help me to solve this problem...?
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