...Issa F. Almesri; Mosab A. Alrahmani; Jaber H. Almutairi; Hosny Z. Abou-Ziyan This paper presents the effect of brick and kiln wall roughness on the fluid flow, pressure drop, and convection and radiation heat transfer in tunnel kilns. The surface roughness of 0–4 mm is investigated for bricks...

...Prasert Prapamonthon; Bo Yin; Guowei Yang; Mohan Zhang This work investigates separate and combined effects of the vane surface roughness and thermal barrier coating (TBC) on the cooling performance of a film-cooled high-pressure turbine vane using computational fluid dynamics (CFD) with conjugate...

... length ( L = 59.5 mm ) , effective length ( L eff = 49.1 mm ) , L / d ( = 9.92 ) , L eff / d ( = 8.18 ) , and wall thickness ( δ = 0.5 mm ) with average surface roughness ( R a = 3.89 μ m ) is used in this work. The SUS304 twisted-tape with twist ratios y [ = H / d = ( pitch of 180 deg rotation ) / d...

...Benjamin J. Jones; Suresh V. Garimella The influence of surface roughness on flow boiling heat transfer and pressure drop in microchannels is experimentally explored. The microchannel heat sink employed in the study consists of ten parallel, 25.4 mm long channels with nominal dimensions of 500...