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dragmodels 100%

F~D = F~D0 2−β (1.5 − ln Re)2 β = 3.7 − 0.65 exp − 2 Ergun Equation The pressure drop over a CFD cell is given by the Ergun equation [3] ~ 0 (1 − )2 ~ 0 |U ~ 0 (1 − ) ∆P µU ρ|U = 150 + 1.75 L (φds )2 3 φds 3 The total force on all particles in a cell is given by Ftot,cell = ∆P Vcell L The force on each particle is given by [4] Fpart = Ftot,cell Vpart ∆P Vpart = Ftot,cell = npart Vcell (1 − ) L(1 − ) ~ 0 (1 − ) ~ 0 |U ~0 µU Fpart ρ|U = 150 + 1.75 Vpart (φds )2 2 φds 2 ~ 0 we substitute ~u.

https://www.pdf-archive.com/2017/03/29/dragmodels/

29/03/2017 www.pdf-archive.com