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发表于 2004-3-15 23:42:47
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请教高手turbulence intensity I的计算方法?
In most turbulent flows, higher levels of turbulence are generated within shear layers than enter the domain at flow boundaries, making the result of the calculation relatively insensitive to the inflow boundary values. Nevertheless, caution must be used to ensure that boundary values are not so unphysical as to contaminate your solution or impede convergence. This is particularly true of external flows where unphysically large values of effective viscosity in the free stream can ``swamp'' the boundary layers.
可以大致估计一个合理的值。 |
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