RT Journal Article
ID 6842501d54468097
A1 Khatra, Laila
A1 El Qarnia, Hamid
A1 El Ganaoui, Mohammed
A1 Lakhal, El Khadir
T1 NUMERICAL INVESTIGATION OF HEAT TRANSFER DURING SOLIDIFICATION IN A RECTANGULAR ENCLOSURE WITH INTERNALLY HORIZONTAL PARTIAL FINS
JF Computational Thermal Sciences: An International Journal
JO CTS
YR 2015
FD 2016-01-05
VO 7
IS 4
SP 293
OP 312
K1 phase change material
K1 solidification
K1 fin
K1 enthalpy method
K1 latent heat storage unit
AB The paper aims to investigate numerically the thermal and flow characteristics of an internally finned rectangular
enclosure during the solidification process of a superheated phase change material (PCM). This work is motivated by the need to intensify heat transfer and accelerate the discharge process in latent heat storage units. A mathematical model is developed and a fixed-grid enthalpy formulation is adopted for modeling the solidification process coupling with convection-conduction heat transfer. The finite volume method was used for discretization. The obtained numerical results are compared with experimental and numerical ones found in the literature and reasonable agreement is obtained.
Numerical investigations were carried out to evaluate the effects of the aspect ratios of the rectangular enclosure, A, and fins, Af , on the heat transfer enhancement, by keeping the mass of the PCM and fins constant. Solutions are obtained for aspect ratios A (ranging from 3 to 8) and Af (ranging from 2.69 to 13.89). A comparative study of finned and unfinned enclosures shows clearly that introducing fins weakens the undesirable natural convection, improves the nondimensional rate of heat extraction, and assures rapid solidification. Results indicate that for an aspect ratio A = 4 and in the range of the aspect ratio Af explored in this study, the nondimensional solidification time is reduced by 17.74%. The results also reveal that for a fin aspect ratio of Af = 5, the nondimensional solidification time is reduced by 49.48% when the aspect ratio of the enclosure, A, varies from 3 to 8.
PB Begell House
LK https://www.dl.begellhouse.com/journals/648192910890cd0e,4ce7f7ee2f0dfe8f,6842501d54468097.html