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Entropy Generation In A Rectangular Packed Duct With Wall Heat Flux, Yasar Demirel, R. Kahraman
Entropy Generation In A Rectangular Packed Duct With Wall Heat Flux, Yasar Demirel, R. Kahraman
YASAR DEMIREL
The entropy generation due to heat transfer and friction has been calculated for fully developed, forced convection flow in a large rectangular duct. packed with spherical particles, with constant heat fluxes applied to both the top (heated) and bottom (cooled) wall. An approximate analytical expression for the velocity profile developed for packed bed with H/dp > 5 has been used together \vith the energy equation of fully developed flow to calculate the nonisothermal temperature profiles along the flow passage. The velocity prolile takes into account the increase in the velocity near the wall due to the higher voidage in this region …
Entropy Generation In A Rectangular Packed Duct With Wall, Yasar Demirel, R. Kahraman
Entropy Generation In A Rectangular Packed Duct With Wall, Yasar Demirel, R. Kahraman
YASAR DEMIREL
The entropy generation due to heat transfer and friction has been calculated for fully developed forced convection flow in a large rectangular duct packed with spherical particles with constant heat fluxes applied to both the top heated and bottom cooled wall.
Packing Size Anetric Heating, Yasar Demirel, B.A. Abu Al-Saud, H.H. Ali, Y. Makkawi
Packing Size Anetric Heating, Yasar Demirel, B.A. Abu Al-Saud, H.H. Ali, Y. Makkawi
YASAR DEMIREL
An experimental and numerical investigation of fully developed forced convection in large rectangular packed ducts is presented. The horizontally oriented ducts have the length-to-separation distance ratio of L/H=16 with two aspect ratios of W/H=8 and 4. A constant heat flux is supplied to the top wall, while the bottom and side walls are insulated. Packing of hard polyvinyl chloride Raschig rings with outside diameters of 48 and 34 mm, and expanded polystyrene spheres with diameters of 48, 38 and 29 mm are used in the air flow passage. The pressure drop, the heat flux, axial and transverse temperature profiles of …
Enhancement Of Convection Heat-Transfer, Yasar Demirel, H.H. Al-Ali, B.A. Abu-Al-Saud
Enhancement Of Convection Heat-Transfer, Yasar Demirel, H.H. Al-Ali, B.A. Abu-Al-Saud
YASAR DEMIREL
Characteristics of wall-to-air heat transfer for a fully developed forced convection have been studied in a large rectangular packed duct with 160 cm heated length, 40 cm width, and for low bed equivalent diameter to particle diameter ratio. The separation distance between the top and bottom walls is 10 cm. A uniform heat ¯ux is supplied at the top wall, while the bottom wall is insulated. Raschig rings in two and spherical packing in three sizes have been used in the air ¯ow passage to investigate the enhancement of heat transfer due to packing. Temperature pro®les for the steady and …