FreeLagrangian hydrodynamics using massless tracer points
Abstract
The partial differential equations (PDEs) describing the time evolution of compressible fluid flow in two and three dimensions are usually solved numerically in the Eulerian frame of reference as opposed to the Lagrangian frame. This is especially true of flows involving large distortions. Lagrangian codes based upon Lagrangian cells do not run very long when the cells become distorted. In order to avoid the problem of cell distortion we have developed a Lagrangian code named HOBO based upon massless tracer points. These tracer points can be thought of as being embedded in, and moving with the fluid. The PDEs which we are trying to solve at each of the points are four equations which represent conservation of mass, momentum and energy, and an equation of state.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 1986
 Bibcode:
 1986STIN...8712822C
 Keywords:

 Compressible Flow;
 Hydrodynamics;
 Partial Differential Equations;
 Time Dependence;
 Applications Programs (Computers);
 Energy Conservation;
 Equations Of State;
 Three Dimensional Flow;
 Two Dimensional Flow;
 Fluid Mechanics and Heat Transfer