Nanofluid Heat Transfer With Inserts

Nanofluid Heat Transfer With Inserts – A Review

Prashant P Shingare, Vilayatrai M. Kriplani

Mechanical Engineering Department, G. H. Raisoni College of Engineering, Nagpur – 16, India Abstact - Heat transfer augmentation techniques refer to different method used to increase rate of heat transfer without affecting much the overall performance of the system. Nanofluid is a new kind of heat transfer medium containing nanoparticles which are uniformly and stably distributed in a base fluid. Nanofluids are potentially applicable as alternative coolants for many areas such as electronics, automobile, air-conditioning, power generation and nuclear applications. In the passive technique, heat transfer enhancement is possibly by providing rough and

Such devices induce turbulence and superimposed swirl causing a thinner boundary layer and consequently resulting higher heat transfer coefficients. This compound enhancement will drastically reduce the size of heat exchanger used in different process applications. Heat transfer augmentation using various types of swirl flow generators like helical screw tapes, twisted tapes, wire coiled inserts, conical ring inserts, etc are reported in literature but limited. However it must be noted that increase in effective thermal conductivity by using nanofluids along with inserts results into a contemporary growth of the effective dynamic viscosity, which could represent a serious limitation. In fact an excessive increase in pressure drop may result in an exaggerated pumping power

The word nanotechnology is new, but it’s existence of the functional devices and structure of nanofluid devices are not new in this world. In 1905, experimental data on diffusion theory showed that the molecule has nanometer diameter, which is considered as a notable landmark in the scientific history of nanotechnology. Since solid particles possess higher thermal conductivity, these nanofluids have thermal conductivities several times higher than that of convention fuels. Several types of nanoparticles can be employed for nanofluid preparation, including metals such as gold, copper and silver and also metal oxides such as Al2O3, CuO. TiO2, Fe3O4. Metal oxides are more attractive for heat transfer enhancement applications because of significantly lower cost compared to