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February 17, 2021, 02:52 |
Periodicity in IC engine RANS simulations
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#1 |
New Member
Guillaume Beardsell
Join Date: Aug 2012
Posts: 19
Rep Power: 13 |
Hi,
I am running RANS of an IC engine for many cycles using a coarse mesh (about 250,000 cells max). I am getting cycle-to-cycle oscillations in the mean quantities, shown here for temperature. I was slightly surprised by this result as after a 2/3 cycles I was naively expecting the RANS framework to "converge" to a periodic solution with a period of one cycle. Is it common to observe such non-periodic behavior? Thanks! Guillaume |
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