scholarly journals Thermal Fluid Flow Transport Phenomenon over Twin Diamond-Shaped Cylinders in Free Stream

2009 ◽  
Vol 29-1 (2) ◽  
pp. 1119-1119
Author(s):  
Shuichi TORII ◽  
Yusaku NONAKA ◽  
Yasushi KOITO ◽  
Toshio TOMIMURA
Keyword(s):  
Transport Phenomenon ◽  
Fluid Flow ◽  
Free Stream ◽  
Flow Transport ◽  
Thermal Fluid Flow

Thermal Fluid Flow Transport Phenomenon Over Vertical Slot-Perforated Flat Fins With Heat Sink in Natural Convection Environment

2005 ◽  
Author(s):  
Shuichi Torii ◽  
Wen-Jei Yang ◽  
Naoko Iino
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Natural Convection ◽  
Rayleigh Number ◽  
Heat Sink ◽  
Heat Transfer Performance ◽  
Transfer Performance ◽  
Vertical Slot ◽  
Flow Transport ◽  
Thermal Fluid Flow

A theoretical study is performed to investigate unsteady thermal and fluid flow transport phenomena over vertical slot-perforated flat fins with heat sink, which are placed in a natural convection environment. Emphasis is placed on the effects of Rayleigh number and fin pitch on heat transfer performance and velocity and thermal fields. It is found from the study that (i) in the high Rayleigh number region, the alternating changes in the fluid flow take place for larger fin pitch, (ii) the alternating flow in the space area between two fins is mutually interacted by the corresponding one from the adjacent in-line plate fines, resulting in an amplification of heat transfer performance, and (iii) heat-transfer performance is intensified with an increase in the fin pitch, whose trend becomes larger in the higher Rayleigh number region considered here.

Thermal Transport Phenomenon in Circular Pipe Flow Using Different Nanofluids

2013 ◽  
Author(s):  
Shuichi Torii
Keyword(s):  
Heat Transfer ◽  
Transport Phenomenon ◽  
Nusselt Number ◽  
Pipe Flow ◽  
Viscosity Ratio ◽  
Volume Fraction ◽  
Circular Tube ◽  
Flow Transport ◽  
Circular Pipe Flow ◽  
Thermal Fluid Flow

The aim of the present study is to investigate the thermal fluid flow transport phenomenon of nanofluids in the heated horizontal circular tube. Consideration is given to the effects of volume fraction of the nanoparticle on the laminar heat transfer and thermal properties. Alumina (Al2O3) and oxide copper (CuO) are employed here as nanoparticles. It is found from the study that (1) the viscosity ratio of nanofluids increases in accordance with an increase of the volume fraction of the nanoparticles, (2) the nanofluids have substantially higher value of Nusselt number than the same liquids without nanoparticles and the Nusselt number of nanofluids increase with an increase of the Reynolds number, and (3) the dispersibility of particle in the nanofluid becomes worse slightly with an increase of the volume fraction of the nanoparticles.

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