Determination of the heat transfer coefficient (HTC) distribution is important during design and operation many devices in microelectronics, construction, car industry, drilling, power industry research on nuclear fusion. The first part manuscript shows works describing how a change affects devices. Next, various methods determining are presented. most common method to determine HTC use Newton’...

basic understanding of the process of coolant heat transfer inside an engine is an indispensable prerequisite to devise an infallible cooling strategy. coolant flow and its heat transfer affect the cooling efficiency, thermal load of heated components, and thermal efficiency of a diesel engine. an efficient approach to studying cooling system for diesel engine is a 3d computational fluid dynami...

water quality trading is a new approach in pollution control which satisfies water quality standards suggesting minimum cost solutions. this method uses tradable discharge permits based on pollution transfer coefficient in a river. this paper tries to establish a water quality trading program in a river basin according to transfer coefficients between pollution sources and evaluate cost effecti...

1. Introduction Surface diffusion is of considerable intrinsic interest and also important for understanding the mechanism of surface reactions [1,2]. It is well known that diffusion of chemisorbed particles occurs, as a rule, via jumps between nearest-neighbor sites and can be rather accurately described in the frameworks of the transitient state theory and lattice-gas model. For simplicity we...

Sometimes the need for non-circular ducts arises in many heat transfer applications because of lower pressure drop of non-circular cross section such as square duct compared to circular tube, particularly in compact heat. But square cross section has poor heat transfer performance and it is expected that using a nanofluid as a new heat transfer media may improve the heat transfer performance of...

The CFD simulation of heat transfer characteristics of a nanofluid in a circular tube under constant heat flux was considered using Fluent software (version 6.3.26) in the laminar flow. Al2O3 nanoparticles in water with concentrations of 0.5%, 1.0%, 1.5%, 2% and 2.5% were used in this simulation. All of the thermo-physical properties of nanofluids were assumed to be temperature independent. Two...