Numerous studies reveal that the heat transfer capability of
thermal systems has been significantly enhanced with the use of
nanofluids. On the other hand, the hazardous nature of the
nanoparticles is evident. Recent ...
Simpson, M.; Rotolo, G.; Sapin, P.; De Palma, P.; White, A.J.; Markides, C.N.(HEFAT, 2017)
Renewable energy sources, such as solar-thermal or geothermal heat, and low-/medium-grade industrial waste-heat can be converted into useful power and/or heating with a variety of technologies, including organic Rankine ...
This paper presents results of a multi-purpose solar thermal system that provides hot service water, space heating and space cooling for residential use during all seasons in Pretoria, South Africa. A pressurized system ...
The flow regime at which a fluid flows is very important in
heat transfer engineering and also analogous to the rate of energy
consumption in the domestic or industrial applications of heat
exchangers. In this article, ...
In order to predict accurately the performance of solar-thermal
or hybrid PVT systems, it is necessary that the steady-state
and dynamic performance of the collectors is understood. This
work focuses on the testing and ...
Present work carries out numerical investigations for 3-D
model of flapping bird wing (owl) by use of commercial
software ANSYS Fluent 15.0. In past, mostly standard air foil
has been used to study flow characteristics ...
The breakup model developed by Luo and Svendsen (1993)
implemented into CFD modelling of gas-liquid two-phase
flows assumes that the bubble shapes are spherical. The
simulation results usually yield an unreliable ...
A theoretical investigation is carried out to
investigate the 2D flow, heat and mass transfer of
magneto hydrodynamic flow of Casson fluid over
three different geometries. Cattaneo-Christov heat
flux with transverse ...
Thermal transient testing is a tool for examining structural
details of a heat conducting path composed of heat conduction
and heat convection sections. Using the change of inherent heat
in electronics, temperature ...
The demand for high thermal conductivity substrates with electrically insulating materials are increasing with the emerging markets in power electronics and mobile telecommunication device packages. Effective heat transfer ...
Kober, M.; Schubert-Zallinger, C.; Wimmer, A.; Milosevic, I.(HEFAT, 2017)
This paper reports on the development of a methodology for designing an on-board pressure sensor and its application to a large bore gas engine cylinder head. A simulation combining CFD and FE calculations is set up and ...
Fukui, M.; Kato, K.; Tsukiyama, S.; Shirakawa, I.(HEFAT, 2017)
The lithium-ion battery is an essential component to drive
mobile systems. The battery behavior varies depending on its
thermal conditions. Thus, to optimize the lifetime performance,
it is important to estimate the ...
Self entraining diffusers are mechanical devices which are
used to entrain ambient (cold) air to mix with the exhaust (hot)
gases. These devices are commonly used at the rear of the gas
turbine engines with the aim of ...
In order to increase the thermal efficiency, gas turbines are designed to operate at higher temperature, which requires a highly efficient cooling structure. The dimples and ribs are effective structures to enhance the ...
In the present work we develop a mathematical model for a bubble immersed in a Maxwell fluid insonified by an ultrasonic field. As in previous works we wanted to see the effect of the viscoelasiticy in the overall behavior ...
The use of Small Gas Turbine to meet on-site small-scale
energy demand offers a great opportunity for preliminary energy
saving and reduction of pollutant and greenhouse emissions. The
properly designed atomizer can ...
Chowdhury, N.H.K.; Qureshi, S.A.; Zhang, M.; Han, J.C.(HEFAT, 2017)
This study focuses on the influence of the internal flow
condition on turbine blade showerhead region film cooling. The
elliptical leading edge model has five rows of film cooling holes
with 15 holes each at fixed ...
Zadravec, M.; Ramsak, M.; Ravnik, J.; Iljaz, J.; Avanzo, M.; Kocevar, K.; Irman, S.; Cegnar, M.; Golobic, I.; Sitar, A.; Hribersek, M.(HEFAT, 2017)
The paper reports on the development of a numerical model
for the simulation of a liofilization process in a vial. The lactose
and mannitol-water mixtures are used as the working medium in
the vial. Experimental analysis ...
Micro/nano-structured superhydrophobic surfaces can enhance
dropwise condensation via coalescence-induced condensate
jumping in well-tailored supersaturation conditions. In this paper
we report our energy-based analysis ...
The use of surfaces with wettability gradient aims to cover
the surface with drops of small size to allow a large heat
exchange. Thus, the action of the wettability gradient on the
surface of the substrate is twofold: ...