Numerical study of natural convection in a square cavity under non-boussinesq conditions
Natural convection in a differentially heated cavity has been carried out under large temperature gradient. The study has been performed by direct simulations using a two-dimensional finite volume numerical code solving the time-dependent Navier-Stokes equations under the Low Mach Number...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2016-01-01
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| Series: | Thermal Science |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-9836/2016/0354-98361400084H.pdf |
| Summary: | Natural convection in a differentially heated cavity has been carried out
under large temperature gradient. The study has been performed by direct
simulations using a two-dimensional finite volume numerical code solving the
time-dependent Navier-Stokes equations under the Low Mach Number
approximation. The LMN model constitutes an important numerical problem for
low speed flows. It is based on the filtering of acoustic waves from the
complete Navier-Stokes equations. Various simulations were conducted
including constant or variable transport coefficients and both small and
large temperature differences. A comparison between an incompressible code
based on the Boussinesq approximation and the LMN compressible code shows
that the incompressible model is not sufficient to simulate natural
convective flow for large temperature differences. |
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| ISSN: | 0354-9836 2334-7163 |