Topic
Heat transfer
About: Heat transfer is a research topic. Over the lifetime, 181795 publications have been published within this topic receiving 2923586 citations. The topic is also known as: heat exchange.
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TL;DR: By combining nanofluids with thermally excited oscillating motion in an oscillating heat pipe (OHP), Wang et al. as mentioned in this paper developed an ultrahighperformance cooling device, called the nanoffluid oscillating pipe.
Abstract: By combining nanofluids with thermally excited oscillating motion in an oscillating heat pipe (OHP), we developed an ultrahigh-performance cooling device, called the nanofluid oscillating heat pipe. Experimental results show that when the OHP is charged with nanofluid, heat transport capability significantly increases. For example, at the input power of 80.0W, diamond nanofluid can reduce the temperature difference between the evaporator and the condenser from 40.9to24.3°C. This study will accelerate the development of a highly efficient cooling device for ultrahigh-heat-flux electronic systems.
298 citations
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TL;DR: In this paper, the effects of magnetic number, Hartmann number, Rayleigh number, and nanoparticle volume fraction on hydrothermal behavior have been examined and it was concluded that the enhancement in heat transfer decreases with an increase in the Rayleigh numbers and magnetic number but it increases with an increasing in the Hartmann numbers.
Abstract: Ferrofluid flow and heat transfer in the presence of an external variable magnetic field is studied. The inner cylinder is maintained at uniform heat flux and the outer cylinder has constant temperature. The Control Volume based Finite Element Method (CVFEM) is applied to solve the governing equations. Combined magnetohydrodynamic and ferrohydrodynamic effects have been taken into account. The effects of magnetic number, Hartmann number, Rayleigh number and nanoparticle volume fraction on hydrothermal behavior have been examined. Results show that the Nusselt number is an increasing function of Magnetic number, Rayleigh number and nanoparticle volume fraction while it is a decreasing function of the Hartmann number. Also, it can be concluded that the enhancement in heat transfer decreases with an increase in the Rayleigh number and magnetic number but it increases with an increase in the Hartmann number.
298 citations
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TL;DR: In this paper, the authors investigated the effects of strong non-uniformity of fluid properties whilst avoiding other complications associated with the temperature dependence of density, which can lead to important effects on the mean flow and turbulence fields and heat transfer effectiveness.
298 citations
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TL;DR: In this paper, a numerical study to investigate the steady laminar natural convection flow in a square cavity with uniformly and non-uniformly heated bottom wall, and adiabatic top wall maintaining constant temperature of cold vertical walls has been performed.
297 citations