Numerical Investigation On The Heat Transfer Characteristics Of The Fluid Boundary Layer Controlled With Electromagnetic Volume Force

In this paper,the effect of electromagnetic force on the convective heat transfer is studied.The boundary layer control of electromagnetic force is a special control method in the study of flow control.Compared with other control methods,it is more convenient and flexible.In this paper,combined with the characteristics of convective heat transfer,electromagnetic fluid control and random crossing model,the following research:1.The effect of electromagnetic force on the convective heat transfer around a cylinder is studied.The numerical results are compared with the results of numerical calculation by using the empirical formula of convection heat transfer around the cylinder and the calculation results of commercial software fluent.The results show that the average Nusselt number with the electromagnetic force increases showed first increased and then decreased and finally increased the effect.2.The effect of electromagnetic force on the convective heat transfer is studied.The study is divided into two kinds of wall heating.The first one is that the whole wall of the missile body is heated,and the two is heated by the local wall of the missile body.The results show that the convective heat transfer is enhanced gradually with the increase of electromagnetic force.3.For the unstable heat source,this paper introduces the random crossing model to describe this kind of unstable heat source.The numerical results show that the heat transfer rate of the convective heat transfer in a given heat source is changed periodically.The flow of electromagnetic force applied in the body boundary layer,the calculation results show that the flow of electromagnetic force still can strengthen the body of local convective heat exchange through random,and with the passage of time,the strengthening effect is more obvious.With the increase of the streamwise electromagnetic force,the heat transfer rate of the heat transfer coefficient of the local wall is larger and larger.