Implementation of a simple model for linear and nonlinear mixing at unstable fluid interfaces in hydrodynamics codes
A simple model was recently described for predicting the time evolution of the width of the mixing layer at an unstable fluid interface [J. D. Ramshaw, Phys. Rev. E 58, 5834 (1998); ibid. 61, 5339 (2000)]. The ordinary differential equations of this model have been heuristically generalized into partial differential equations suitable for implementation in multicomponent hydrodynamics codes. The central ingredient in this generalization is a nun-diffusional expression for the species mass fluxes. These fluxes describe the relative motion of the species, and thereby determine the local mixing rate and spatial distribution of mixed fluid as a function of time. The generalized model has been implemented in a two-dimensional hydrodynamics code. The model equations and implementation procedure are summarized, and comparisons with experimental mixing data are presented.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15006143
- Report Number(s):
- UCRL-JC-139800; TRN: US200405%%282
- Resource Relation:
- Conference: 2000 Nuclear Explosives Code Development Conference, Oakland, CA (US), 10/23/2000--10/27/2000; Other Information: PBD: 1 Oct 2000
- Country of Publication:
- United States
- Language:
- English
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