On the basis of architecture of CPUs/GPUs and hybrid thermal lattice Boltzmann method

unsteady state numerical simulations on mixed convection and heat transfer in three-dimensional simplified model of the spacecraft cabin under microgravity are performed.The results show that

when the heating component with constant heat flow boundary is located in the center of the model wall which is swept by the inlet air

the average Nusselt number ■ of the hot wall reaches the largest and the heat transfer is the strongest.When the model scale is or below 1:5 and the Reynolds number Re is kept unchanged

the average Nusselt number ■ of the hot wall

and the transient evolution process of the flow and temperature field of the scaled model under gravity environment is the same as that of the prototype under microgravity environment

which can be used to guide the experimental study under microgravity on the ground.With ultra high efficiency

the multiple GPUs combined with LBM can realize real-time prediction of flow and heat transfer in electric system and equipment cabin of the spacecraft.