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Natural convection heat transfer in partially open inclined square cavities. (English) Zbl 1189.76516
Summary: A numerical study has been carried out on inclined partially open square cavities, which are formed by adiabatic walls and a partial opening. The surface of the wall inside the cavity facing the partial opening is isothermal. Steady-state heat transfer by laminar natural convection in a two dimensional partially open cavity is studied by numerically solving equations of mass, momentum and energy. Streamlines and isotherms are produced, heat and mass transfer is calculated. A parametric study is carried out using following parameters: Rayleigh number from $$10^{3}$$ to $$10^{6}$$, dimensionless aperture size from 0.25 to 0.75, aperture position at high, center and low, and inclination of the opening from $$0^{\circ }$$ (facing upward) to $$120^\circ$$ (facing $$30^{\circ }$$ downward). It is found that the volume flow rate and Nusselt number are an increasing function of Rayleigh number, aperture size and generally aperture position. Other parameters being constant, Nusselt number is a non-linear function of the inclination angle. Depending on the application, heat transfer can be maximized or minimized by selecting appropriate parameters, namely aperture size, aperture position and inclination angle at a given operation Rayleigh number.

##### MSC:
 76R10 Free convection 76M12 Finite volume methods applied to problems in fluid mechanics 80A20 Heat and mass transfer, heat flow (MSC2010)
##### Keywords:
natural convection; partially open cavity; inclined cavity
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