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Natural Convection with Dissipative Heating
Communications in Mathematical Physics, 2000We derive a system of equations which models the motion of linear viscous fluids that undergo isochoric motions in isothermal processes but not necessarily isochoric ones in non-isothermal processes. The main point is that in contrast to the usual Oberbeck–Boussinesq approximation we do not neglect dissipative heating.
Kagei, Yoshiyuki +2 more
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Onset of natural convection in a cube
International Journal of Heat and Mass Transfer, 1993The problem of transient natural convection in a cube-shaped cavity is investigated ex- perimentally and numerically. The motion is driven by a sudden temperature difference ap- plied to two opposite side walls of the vessel. The experiments are performed at a Rayleigh number of 1:66 10 5 and a Prandtl number of 1109, inside a 5 5 5cm 3 cavity made of ...
W. Hiller +3 more
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Natural convection in shallow water
Nonlinear Analysis: Real World Applications, 2007Starting from the 3D Boussinesq model and taking the limit as the domain thickness tends to zero, we derive rigorously the 2D model for natural convection in shallow water. The model reduces to a degenerated elliptic equation for the pressure, an explicit formula for horizontal components of the velocity and a vertical diffusion for the vertical ...
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Natural convection along a wedge
Journal of Thermophysics and Heat Transfer, 1987The separation of the natural-convection boundary layers near the tip of a vertical wedge is analyzed. The boundary layer becomes inviscid, but rotational near the tip. An induced pressure gradient in this flow region responds to the upstream transmission of the downstream geometry change. Large temperature and velocity gradients are induced across the
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Natural Convection Film Boiling
2007If the wall temperature at film boiling is larger then the Leidenfrost or the socalled minimum film boiling temperature an unstable heat-transfer regime is observed, being partially film boiling and partially nucleate boiling called transition boiling.
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1997
This chapter introduces the notion of natural convection. In natural convection, the fluid velocity arises purely from the heating or cooling of the heat transfer surface itself. Heating creates less dense fluid next to the surface which tends to rise under buoyancy. Furthermore, the low velocities (compared to forced convection) give low heat transfer
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This chapter introduces the notion of natural convection. In natural convection, the fluid velocity arises purely from the heating or cooling of the heat transfer surface itself. Heating creates less dense fluid next to the surface which tends to rise under buoyancy. Furthermore, the low velocities (compared to forced convection) give low heat transfer
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Natural convection in transformers
Journal of the Institution of Electrical Engineers, 1958E.D. Taylor, B. Berger, B.E. Western
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