time step choice for transient heat conduction problem of solid in convective flowfield
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Lumped body in convective flowfield Heat generation of lumpted body Estimate the proper choice for dt for unsteady simulation From a 0-D analysis, time constant, tc = hA/(rho C Vol) where h = conv. h.t. coeff rho = density of lump C = heat capacity of lump Vol = volume of lump A = surface area. Compute tc using above formula. Chose dt = 1/10 to 1/100 of tc. |
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