In heat sinks, the flow within the core exhibits separation and hence does not lend itself to simple analytical boundary layer or duct flow analysis of the wall friction. In this paper, we present some findings from an experimental and numerical study aimed to obtain physical insight into the influence of the presence of the shield and its position on the hydraulic and thermal performance of sq...

In the current work optimization of double pipe fin-pin heat exchanger has been studied. The effective parameters those are controlling the heat exchanger performance are divided in two categories; geometrical and operating conditions. Using the Brent’s optimization algorithm and handling the thermodynamically design concept, one can minimize entropy generation in different length of heat excha...

In Apis mellifera, hygienic behavior involves recognition and removal of sick, damaged or dead brood from capped cells. We investigated whether bees react in the same way to grouped versus isolated damaged capped brood cells. Three colonies of wild-type Africanized honey bees and three colonies of Carniolan honey bees were used for this investigation. Capped worker brood cells aged 12 to 14 day...

Bu çalışmada bir kanal içerisinde bulunan mini pim kanatçıklı ısı alıcısının soğutulması sayısal olarak incelenmiştir. kapsamda kare, beşgen ve altıgen kanatçık geometrileri için, Reynolds sayısının 500-1800, hava giriş sıcaklığının 298-304 K, akısının 5000-30000 W/m2 yüksekliğinin ise 2-8 mm aralıklarında farklı analizler yapılmıştır. sayede geometrisi, sayısı, akısı, akışkan sıcaklığı, yüksek...

Abstract Fins are extended surfaces to increase convection heat transfer. Conventional fins made of solid metals and alloys. Liquid such as sodium have melting points below atmospheric temperature. lower specific heats higher thermal diffusivity when compared metals. These properties can be used in enhancing In the present work, a numerical model is developed for analyzing effect capsulating li...