One substance gives up its heat (or cold) by convection to rotating bodies. The other substance concerned in the heat transfer flows against these bodies, which steadily attain maximum temp. on every surface part, by convection and thermal flow.GRANTZ,SIEGFRIED,DIPL.-ING.DR.-ING.DR....
Experimental data were obtained for the heat transfer coefficient between electrically-heated horizontal tube bundles and square fluidised beds of silica sand and alumina as a function of air fluidising velocity. Heat transfer data for a bundle of tubes are compared with a single tube under otherwise...
Heat transfer Two substances must have different temperatures in order to transfer heat from one to the other. Heat always flows from the warmer substance to the colder. The heat flow is rapid when the temperature difference is great. During heat transfer, the difference in temperature is gradual...
Heat exchangers are equipment for the transfer of heat between two fluids through a separating wall, and the three recognized modes of heat transfer are by conduction, convection, and radiation. The thermal conductivity is a fundamental property of substances that basically is obtained experimentally,...
cutset/an even pair/an odd pair/a skew partition, and two conjectures of Seb which are together equivalent to the SPGC and attempt to bridge the gap between partitionable graphs and MIGs through the concept of a small transversal... I Rusu 被引量: 6发表: 2001年 Fault-tolerant conversion...
McNelly [cf.9] proposed a correlation of pool boiling heat transfer coefficient for pure substances including bubble departure diameter, heat flux, system pressure and thermo-physical properties of fluids. (1)h=0.225(klDd)(qDdhlvμl)0.69(PDdσl)0.31(ρl−ρvρv)0.33(Cplμlkl)0.69 ...
Frontiers in Heat and Mass Transfer is a free-access and peer-reviewed online journal that provides a central vehicle for the exchange of basic ideas in heat and mass transfer between researchers and engineers around the globe. It disseminates informatio
Frontiers in Heat and Mass Transfer is a free-access and peer-reviewed online journal that provides a central vehicle for the exchange of basic ideas in heat and mass transfer between researchers and engineers around the globe. It disseminates informatio
We have just derived a useful equation for the heat flux between two black, diffuse surfaces q1 − 2 = A1F1 − 2(Eb1 − Eb2). In analogy to Ohm's law, this can be rewritten in the form of a resistance to heat transfer as q1 − 2 = (Eb 1 − Eb2)/Rspatial where R...
If two substances have approximately the same vapour pressure, then the one with the smaller molar volume is retained the longer. For example on squalane, methylcyclohexane has a larger retention time than heptane, although both have almost the same boiling point (methylcyclohexane b.p. 100.9 °C...