Naslov
Ice Melting DrIven by Natural Convection in the Rectangular Cavity Filled with Water
(Ice Melting Druven by Natural Convection in the Rectangular Cavity Filled with Water)

Autori
Virag, Zdravko ; Živić, Marija ; Galović, Antun

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of The ASME-ZSIS International Thermal Science Seminar II, June 13-16, 2004, Bled, Slovenia (Thermal Sciences 2004) / Bergles A.E. ; Golobič, I. ; Amon Ch.H. ; Bejan A. - Ljubljana : ASSME-ZSIS, 2004, 999-1012

Skup
Thermal Sciences 2004

Mjesto i datum
Bled, Slovenija, 13.06.2004. - 16.06.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ice melting; moving boundary; isothermal walls; natural convection; rectengular cavity; numerical solution

Sažetak
The influence of natural convection during melting of a long ice block in rectengular cavity with isothermal vertical walls is analyzed numerically. The ice block in the middle of the cavity and the initial volume of ice is 1/8 of the cavity volume. The unsteady two-dimensional melting of ice is governed by the continuity, momentum and energy equations and by the following assumptions:the liquid phase is incompressibleand the Boussinesq approximation is met, the flow is laminarand viscous dissipation is neclected. The finite volume method is adopted and computations are carried out on a non-fixed grid. The governing equations are discretised using the exponential differencing scheme for spatial derivates and the fully implicit scheme for the time integration: The SIMPLER algorithm is used for the pressure -velocity coupling. In the cases of the wall temperature higher than 8C, the melting process can be devided into three typical successive regims: an initial pure conduction regime, a transition regime and a convection dominated regime.In the case of hot wall temperature equal 8 C, two vortices are separated by nearly vertical 4 C isotherm and the average Nusselt number remains constant during the time interval corresponding to the first sub-regime of the convection dominated regime. In the case of hot wall temperature higher than 8 C, the ice melts faster frome above, and for the one lower than 8 C from below.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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