This paper deals with an experimental study on the frosting phenomena using a fin bundle, which is an expanded model for the fins of the heat exchanger. The overall characteristics such as total frost mass, mass flux, pressure drop, sensible and latent heat fluxes and the local characteristics such as local temperature, local heat flux and local frost thickness were investigated under several e...

A Monte Carlo c^timization technique called "simulated annealing" is a descent algorithm modified by random ascent moves in order to escape local minima which are not global minima. Tlie levd of randomization is determined by a control parameter T, called temperature, which tends to zero according to a deterministic "cooling schedule". We give a simple necessary and suffident conditicm on the c...

We have investigated the effect of severe local cooling on the vasomotor activity of the arteriovenous anastomoses (AVAs) and other finger vessels. The right third finger was subjected to local cooling (3°C) for 30-45 min in 21 healthy, thermoneutral subjects. Blood velocity in the third finger arteries of both hands was simultaneously recorded using ultrasound Doppler, and skin temperature and...

An experimental investigation of the local film cooling effectiveness and heat transfer coefficient downstream of a row of elongated holes in a simulated axial turbine blade tip is presented. Film cooling is needed to protect the turbine blade tip region from high heat transfer rates, especially when cooling by convection is insufficient to keep the temperature distribution of the blade within ...