Foundation item:NSFC(No.50875200 and 50845011);Research Fund for the Doctoral Program of Higher Education of China(No.20090201120014 and 20070698088);Fundamental Research Funds for the Central Universities
A three dimensional model including a non-rotational symmetry keyhole of which the geometry is calculated base on the energy balance at keyhole wall is created to simulate the heat transfer and fluid flow within the m...