Heat and Mass Transfer
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Thermal analysis of composite superconductors subjected to time-dependent disturbances
Heat and Mass Transfer - - 1997
A one-dimensional heat conduction equation with time- and temperature-dependent heat sources was employed to study the steady-state and transient response of a composite superconductor subjected to a thermal disturbance. An integral formulation was used to solve the steady-state problem of current redistribution and heat generation. The results of the integral formulation are compared with those ...... hiện toàn bộ
Stationary and transient heat conduction in a non homogeneous material
Heat and Mass Transfer - Tập 20 - Trang 269-272 - 1986
An apparent thermal conductivity for inhomogeneous materials is widely used. In this paper it is demonstrated that the apparent thermal conductivity for stationary heat conduction is not sufficient to describe the transient heat response of an inhomogeneous medium. In the geometry we used the heat transfer is estimated too high when the stationary thermal conductivity is employed. A numerical solu...... hiện toàn bộ
Forced convection of turbulent flow in triangular ducts with different angles and surface roughnesses
Heat and Mass Transfer - Tập 34 Số 1 - Trang 63-68 - 1998
On thermal boundary layer of a non-Newtonian fluid on a power-law stretched surface of variable temperature with suction or injection
Heat and Mass Transfer - Tập 37 Số 4-5 - Trang 459-465 - 2001
Berechnung des dynamischen Verhaltens von instationären Temperaturfeldern in zylindrischen Bauteilen
Heat and Mass Transfer - Tập 7 - Trang 121-132 - 1974
Im ersten Teil dieser Untersuchung wird zur Betrachtung des dynamischen Verhaltens instationärer Temperaturfelder in den Wandungen zylindrischer Rohre ein mathematisches Modell erstellt und mit Hilfe der Laplace-Transformation ausgewertet. Im einzelnen werden dabei die Übertragungsfunktionen der Rohrwandtemperaturen hergeleitet und für den Fall der Abweichung vom stationären Zustand unter dem Einf...... hiện toàn bộ
Stationary stall phenomenon and pressure fluctuation in a centrifugal pump at partial load condition
Heat and Mass Transfer - Tập 55 - Trang 2277-2288 - 2019
Stall is a common flow phenomenon in the rotating machinery under partial load conditions. The stall phenomenon can seriously affect the operation efficiency and stability of the machinery. In the present research, the stall phenomenon in a centrifugal pump is numerically studied using the SST k-ω turbulence model. In the present work, four different flow rates (1.0 Qd, 0.7 Qd, 0.5 Qd and 0.3 Qd, ...... hiện toàn bộ
Subsurface thermal sensitivity evaluation of magnetic nanoparticles for theranostics using infrared thermography
Heat and Mass Transfer - Tập 59 - Trang 803-816 - 2022
Superparamagnetic ferrites are potential materials explored for magnetic nanoparticle hyperthermia. Theranostics utilizing infrared thermography with iron oxide nanoparticles demand better heating characteristics and thermal sensitivity that are affected by the biological fluid and absorption by the tissue layer. Agar gel phantoms were incorporated with the ferrite particles dispersed in albumin a...... hiện toàn bộ
Laser-induced cavitation bubble behavior on solid walls of different materials
Heat and Mass Transfer - Tập 58 - Trang 499-504 - 2021
Laser-induced cavitation bubble behavior on the solid walls of different materials was experimentally investigated by focusing the pulsed laser on the wall. To examine the influence of wall reflectivity on laser-induced cavitation, high-speed observations of the bubble behavior and impulsive-force measurements were carried out on aluminum, steel, copper, and acrylic resin walls. It was found that ...... hiện toàn bộ
Three-dimensional CFD modeling of transport phenomena in anode-supported planar SOFCs
Heat and Mass Transfer - Tập 50 - Trang 1575-1586 - 2014
In this study, a three-dimensional computational fluid dynamics model has been developed for an anode-supported planar SOFC. The conservation equations of mass, momentum, species/charges and thermal energy are solved by finite volume method for a complete unit cell consisting of 13 parallel channels in both anode and cathode. The simulation results of the developed model are well in agreement wit...... hiện toàn bộ
An experimental investigation on performance of rectangular fins on a horizontal base in free convection heat transfer
Heat and Mass Transfer - Tập 33 - Trang 507-514 - 1998
This paper reports an experimental study of free convection heat transfer from rectangular fin-arrays on a horizontal base. An experimental set-up was constructed and calibrated, 15 sets of fin-arrays and a base plate without fins were tested in atmosphere. Fin height was varied from 6 mm to 26 mm, fin spacing was varied from 6.2 mm to 83 mm. The base-to-ambient temperature difference was also va...... hiện toàn bộ
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