Mixture theory for turbulent diffusion of heavy particles
Abstract
The classical sedimentation problem in view of the continuum theory of mixtures is examined. The source of the diffusive flux that balances the gravitational setting flux of negatively buoyant particles in a steady, uniform mean flow is identified. Mixture theory offers a powerful tool for examination of this problem. It provides a rigorous axiomatic framework for the dynamics of two phase flow, explicitly including exchanges of momentum between the phases. The theory very clearly demonstrates the behavior of the fluid phase, the dispersed particulate phase, and the total mixture.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1982
- Bibcode:
- 1982STIN...8323567M
- Keywords:
-
- Buoyancy;
- Particle Diffusion;
- Sediment Transport;
- Turbulent Mixing;
- Two Phase Flow;
- Boussinesq Approximation;
- Momentum Theory;
- Particle Interactions;
- Fluid Mechanics and Heat Transfer