نتایج جستجو برای: thermal diffusion
تعداد نتایج: 374627 فیلتر نتایج به سال:
A theoretical treatment is given of the recently discovered thermotransport effect in pure liquid metals. The isotope effect is related to the diffusive mass flow by a proportionality factor familiar from electrotransport. The mass flow is given primarily by the temperature dependence of the mean size or amount of density fluctuations in the liquid. Very little activation energy is required for...
Vitalyi Gusev, Walter Craig, Roberto LiVoti, Sorasak Danworaphong, and Gerald J. Diebold Université du Maine, av. Messiaen, 72085 LeMans, Cedex 09 France, Department of Mathematics McMaster University, Hamilton, Ontario, Canada L8S 4K1, Universita di Roma “La Sapienza”, Dipartimento di Energetica, Via Scarpa, 14 — 00161 Roma,Italy School of Science, Walailak University, 222 Thaiburi, Thasala Di...
and the lepton interactions on the other hand. We note further that the quantities xpr C yx ip and ipT C yxy5y> are covariants not only under real but also under special complex transformation as can be proved easily by using relation (8 c). As to the quantization, we have already remarked above, that one can perhaps make use of the linearity of the field equation in the “intrinsic” system by w...
We analyze the diffusive motion of kink solitons governed by the thermal sine-Gordon equation. We analytically calculate the correlation function of the position of the kink center as well as the diffusion coefficient, both up to second-order in temperature. We find that the kink behavior is very similar to that obtained in the overdamped limit: There is a quadratic dependence on temperature in...
In the field of physical sciences and in chemical process technology, the purification of materials is very often most important. In many situations conventional processes such as distillation and crystallization are not applicable as in the case of closely boiling liquids, organic dyes, biologicals and colloids. I n such cases, the less conventional techniques assume a great importance. Of the...
In this paper thermal conductivity and thermal diffusivity of a two layer system is examined from the theoretical point of view. We use the one dimensional heat diffusion equation with the appropriate solution in each layer and boundary conditions at the interfaces to calculate the heat transport in this bounded system. We also consider the heat flux at the surface of the samle as boundary cond...
(By measurement we mean all variables of a theoretical relation that determine the length have been quantitatively observed, no ROMs.) The skew above the electron skin depth of the scale length population determined an average scale length of the ‘‘EDRs’’ 80% higher than the upper bound stated in the ‘‘EDR’’ study’s abstract. This situation contributes another average multiplicative enhancement...
Abstract. Cubic crystalline oxides such as Y2O3 and MgO is used to stabalized zirconia phases at high temperature. In this paper the Y2O3 powder was added to stabilized zirconia and preparing a mixture of MgAl2O4 Spinel by mixing 1mol of nano-MgO with 1 mol of nano-Al2O3 powders. The spinel was added to the Y2O3-ZrO2 by various weight percentage (5, 10, 15, 20 and 25 wt%), and after that the sp...
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