24M cells is going to be very tight on 32GB RAM, and a malloc (Memory ALLOCation) error suggests too tight so the solver fails. You need to reduce the cell count, find more RAM or (possibly) switch from Pressure Based Coupled to SIMPLE as that uses marginally less RAM. However, depending on the models etc it may still not work well. Also, I'd be happy with 1M cells on a core for speed, 4-6M cells is going to take you a fair bit of time to solve.Â
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