Abstract
Numerical and experimental study on steady mixed convection gas flow around a hot spherical particle is presented for small values of Reynolds and Grashof numbers and all mixed convection parameter range. The flow regimes considered are the axis-symmetric co-flow and opposed flow for the non-dimensional Boussinesq model. The sensitivity of the numerical computations with respect to the dimension of the computational domain is discussed. The opposed flow regime and the formation of re-circulation secondary flow is analyzed. A qualitative expression for the drag force induced on the particle by the flow is given for all range of the mixed convection parameter, the expression holds for the co-flow configuration but brakes up in the opposed flow regime when re-circulation secondary flow evolves. Experimental measurements of the drag force induced on a small spherical particle allows further examination of the numerical computations and theory.
Original language | English |
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Pages (from-to) | 387-409 |
Number of pages | 23 |
Journal | Journal of Aerosol Science |
Volume | 36 |
Issue number | 3 |
DOIs | |
State | Published - 1 Jan 2005 |
Keywords
- Buoyancy
- Drag force
- Forced-convection
- Free convection
- Mixed convection
ASJC Scopus subject areas
- Environmental Engineering
- Pollution
- Mechanical Engineering
- Fluid Flow and Transfer Processes
- Atmospheric Science