说明：  带中心射流的通道内的紊流换热,带一般中心射流的流体进入一平行板通道。流动为紊流，μ＝10－6,Pr=0.7 紊流K-ε模型方程中的源项的处理
(The turbulence within the heat exchanger with a central jet passage, with generally central jet fluid into the channel of a parallel plate. The flow is turbulent, μ = 10-6, Pr = 0.7 processing of the source term in the turbulent K-ε model equations)