Calculation of Complicated Flows, Using First and Second-Order Schemes (RESEARCH NOTE)

摘要: The first-order schemes used for discretisation of the convective terms are straightforward and easy to use, with drawback introducing numerical diffusion. Application secondorder schemes, such as QUICK scheme, is a treatment reduce diffusion, but increasing convergence oscillation unavoidable. technique in this study compromise between above-mentioned problem, i.e. reducing diffusion stability solution. This double folded task achieved by modified second-order hybrid scheme. In addition that means formulation it possible show coefficients discretised equation at all neighboring points positive value coefficient pole point equal sum its points, which two basic conditions defined Patankar satisfied. Therefore, scheme has benefits both first second order together. Results obtained predict complicated flow regimes were promising agreed well experimental data.