Method development S·hmygvn Tkhyy (PPM) reconstruction method using boundary Chndmadhyy VOF

Despite lack of attention to solving the boundary between materials in the field, even using high precision merical solution methods, such as Tkhyy S·hmygvn method (PPM), to disorders such as instability and divergence over the results of the numerical solution of the process or lead to incorrect results. In order to prevent such cases, the methods used Dnbalsazy border. In Dnbalsazy border procedures, position and shape of the boundary etween two materials in each set timeframe, then properties, including the border cells) mixed cells (using a special relationship as "mixed model" is calculated. In the present study for the numerical solution of equations Gvdvnfy PPM method used and to increase the accuracy of this method in dealing with issues Chndmadhyy, the types of procedures Dnbalsazy boundaries, fluid volume method (VOF) is selected. Among the existing models of mixed model "Hmfshar Hmanrzhy and models "volume fraction fixed" order and selected by appropriate model, the results of the two is compared. Numerical results obtained from the VOF method in solving Chndmadhyy shock tube, Mlahzhyy improvement compared with PPM method shows.