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Christian Prax

Publications and source records attributed to Christian Prax.

3 recordsLinked to original sources
arXiv2018

Co-located diffuse approximation method for two dimensional incompressible channel flows

The main contribution of this paper is the formulation of a diffuse approximation method(DAM), for two-dimensional channel flows. The proposed method is based on the vorticity-streamfunction formulation. The DAM which estimates derivates of a scalar field has the remarkable advantage to work on discretization points (thus avoiding mesh generation). It has been shown that the DAM is much better than the finite element method for the computation of gradients [1-2]. In a previous paper [3], we have shown that it can be used to solve laminar natural convection problems. In this work, we discuss the applicability of this method to channel flows with a particular emphasis on the form of the weighting function.

physics.comp-ph↗
arXiv2018

A new meshless approach for three dimensional fluid flow and related heat transfer problems

The mathematical formulation, basic concept and numerical implementation of a new meshless method for solving three dimensional fluid flow and related heat transfer problems are presented in this paper. Moving least squares approximation is used for the spatial discretization together with an implicit scheme for time marching. The vorticity and vector potential formulation of Navier-Stokes equations is employed to avoid the difficulties associated with pressure/velocity coupling. Two 3D problem of natural convection in a differentially heated cubic cavity and in the annular space between a sphere and a cube are considered. Results show the flexibility of the method and demonstrate its accuracy.

physics.comp-ph↗