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�������պ����ѧѧ�� 2010, Vol. 36 Issue (8) :904-908    DOI:
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������Ԥ����Roe��ʽ�е���ֵճ��
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Numerical dissipation of Roe’s scheme with preconditioning for low-speed flows
Cao Ning, Wu Songping*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� Preconditioning is necessary for simulating of low-speed flows with Roe-s scheme. With most research on choosing preconditioning parameter, the solution may be wrong. Numerical experiments show the numerical dissipation of the scheme has a notable effect on low-speed flow numerical simulation with preconditioning method. A manner by using an adjustable parameter in preconditioning Roe-s scheme to control the numerical dissipation was proposed. The numerical dissipation of preconditioning Roe-s scheme with an adjustable parameter was more similar to the real dissipation of low-speed flows and reflected the real physical phenomena of low-speed flows. Numerical results show the efficiency of the new scheme and the low Reynold-number steady solutions of viscous flow past a circular cylinder and square cavity flow are satisfied. Also indicate that the applicability of the new scheme and different low Mach number with the same low Reynold-number steady solutions of viscous flow past a circular cylinder are also satisfied.
Keywords�� numerical methods   steady flow   cylinders     
Received 2010-01-28;
About author: �� ��(1980-),��(����),�ӱ�����������������,��ʿ��,cnbuaa@sina.cn.
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����, ����ƽ.������Ԥ����Roe��ʽ�е���ֵճ��[J]  �������պ����ѧѧ��, 2010,V36(8): 904-908
Cao Ning, Wu Songping.Numerical dissipation of Roe’s scheme with preconditioning for low-speed flows[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(8): 904-908
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