Boundary layer of a non-equilibrium gas-particle mixture modified by particle lifting motion behind a shock front
Abstract
A shock tube wall boundary layer of a dusty gas is studied by a numerical analysis and by experiments. The particle motion transversal to the flow direction is satisfactorily computed by accounting a lift force induced by a combined effect of the interphase velocity slip and the laminar shear flow. The iteration procedure consists of a Box method to solve the shear layer equations and a Lagrangian method to integrate the particle behaviors. The result indicates that the boundary layer with particles larger than 10- micron diameter is constituted with a thick outer layer of high particle concentration and a particle rare inner wall layer. The wall heat transfer of the dusty gas flow is almost determined by the clean gas flow within the wall layer. Such structural features agree well with the experimental results of a particle number counting and a wall heat transfer measurement.
- Publication:
-
Current Topics in Shock Waves
- Pub Date:
- 1990
- Bibcode:
- 1990ctsw.proc..770O
- Keywords:
-
- Boundary Layer Flow;
- Particle Laden Jets;
- Particle Motion;
- Shock Fronts;
- Two Phase Flow;
- Gas Flow;
- Nonequilibrium Conditions;
- Particle Size Distribution;
- Fluid Mechanics and Heat Transfer