...Pouya Asrar; S. Mostafa Ghiaasiaan; Yogendra K. Joshi An experimental investigation of the flow boiling of dielectric refrigerant R245fa is conducted in microgaps with enhancement features. A silicon microgap of height 200 μ m populated with pin fin arrays of diameter 150 μ m with spacing 200 μ m...

... descending conditions for a medium sized truck, the brake disks were tested at a braking power of 1.9 kW and a rotational speed of 200 rpm as detailed in Sec. 3.4.1 . Figure 8( a ) compares the surface temperature distribution of the pin-finned and WBD brake disks at selected temporal intervals...

... with minichannels and microchannels, result in low Reynolds number flows, in the laminar flow regime, where heat and mass transfer is limited by laminar diffusion of heat, species, and momentum [ 1–7 ]. Laminar periodic wakes and turbulent wakes from pin fins offer a solution to overcoming the laminar diffusion...

... Ω ∫ ∂ S w p ¯ d s → Fig. 1 Conceptual illustration of the application of VAT with closure relationships to ( a ) a pin fin heat sink and ( b ) a tube bank heat exchanger In this paper, a method is implemented that seeks to alleviate many...

...N. K. C. Selvarasu; Danesh K. Tafti; Neal E. Blackwell Previous investigations on the performance of straight pins, pins with tip clearance, and profiled fins showed that closely packed cylindrical pin fins are very competitive with the modified pins. Therefore, the objective of this paper...

... serpentine passages with 180-deg turns under the blade tip cap. In this paper, enhanced heat transfer of a blade tip cap has been investigated numerically. The computational models consist of a two-pass channel with a 180-deg turn and various arrays of pin fins mounted on the tip cap, and a smooth two-pass...

...Ali Rozati; Danesh K. Tafti; Neal E. Blackwell Cylindrical pin fins with tip clearances are investigated in the low Reynolds number range 5 < Re D < 400 in a plane minichannel. Five tip gaps are investigated ranging from a full pin fin ( t * = 0.0 ) to a clearance of t * = 0.4 D * , where D...