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论文类型：期刊论文

发表时间：2008-10-01

发表刊物：PHYSICA SCRIPTA

收录刊物：SCIE、EI、Scopus

卷号：78

期号：4

ISSN号：0031-8949

摘要：Focusing of hot plasma flowing in a channel with a blunt object at its exit by lateral boundary injection of cold fluid is investigated numerically. A two-dimensional axisymmetric model based on one-fluid magnetohydrodynamic equations including viscous and thermal conduction effects is used. For the numerical simulation, the upwind scheme with uniform mesh in space and time is adopted. The evolution of the temperature, velocity and pressure of the plasmas in the channel is analyzed. It is found that increasing the pressure of the cold lateral flow compresses the thermal plasma flow such that the temperature profile of the hot plasma flow becomes more focused. Increasing the incident angle of the cold flow tends to increase the temperature gradient of the hot flowing plasma but tends to decrease the temperature on the surface of the object. The results are useful for controlling the temperature of channel flows as well as objects placed in them.