Publication: Experimental investigation of horizontal convection
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2015-07
Defense date
2015-07-08
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Abstract
Fluid circulation driven by buoyancy forces due to a thermal gradient on a horizontal
boundary, known as horizontal convection, is experimentally studied.
For that purpose, a methacrylate box with inner dimensions 300x150x150 mm3
(LxWxH) whose bottom is composed by a heat exchanger and a printed circuit
board is lled with water. The heat exchanger provides a uniform temperature
boundary condition while the printed circuit board provides a boundary condition
of uniform heat fl
ux input. The lateral walls and top cover are adiabatic.
Moreover, infrared thermography is used together with the heated thin foil sensor
technique in order to visualize the results. Experimental set-up components
and process to carry the tests are explained in detail. Results are presented as
2D Nusselt number maps, showing three differentiated stages of the transient
regime of the
fluid circulation and the different results obtained under tested
ranges of the boundary conditions (RaF = [1.3. 10 11 -- 1.1.10 12] at Pr = 7 based
on initial conditions and aspect ratio of the domain A = 0.5). Uncertainties of
the results are calculated so that coherent values are ensured. Furthermore, possible
future work to be done in this particular thermodynamic-fl
uid field and
conclusions are reported.
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Keywords
Mecánica de fluidos, Thermodynamic-fluid, Horizontal convection