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ÎÒ´ÓfluentµÄuser guide ÉÏÕÒµ½Á˴𰸣º 1. For flows using one of the k-e models, one of the k-w models, or the RSM, the converged solutions or (for unsteady calculations) the solutions after a sufficiently long time has elapsed should be independent of the initial values for k and e (or k and w). 2. For better convergence, however, it is beneficial to use a reasonable initial guess for k and e (or k and e). In general, it is recommended that you start from a fully-developed state of turbulence.When you use the enhanced wall treatment for the k- models or the RSM, it is critically important to specify fully-developed turbulence fields. |
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´ÓÉÏÃæµÄÃèÊöÀ´¿´£¬ÒòΪ turbulence intensity The relationship between the turbulent kinetic energy, k, and turbulence intensity, I, is k =3/2(Uavg*I)^2 If you know the turbulence length scale, l, you can determine Turbulent Dissipation Rate e from the relationship e = (C^3/4*k^3/2)/l turbulence intensityʵ¼ÊÉÏÊÇÓÃÀ´¹ÀËãkºÍµÄe£¬ËùÒÔ¼´Ê¹¿ªÊ¼turbulence intensityÉèÖõIJ»×¼ Èç¹ûÊÇ·ÇÎÈ̬¼ÆË㣬¼ÆËãʱ¼ä×ã¹»³¤£¬¶Ô×îºó½á¹ûÒ²²»»á²úÉúÌ«´óÓ°Ïì |
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