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Mar 31, 2023Open Access
A numerical calculation of the temperature and magnetic field dependence of the specific heat capacity, the magnetization, and the chemical potential is carried out. Of particular interest are the properties of the energy of a magnetic field in a two-dimensional electron gas exposed to a magnetic field. Thus, in this paper, we illustrate the effect of temperature on the oscillation dHvA of specific heat capacity and magnetization. As well a mathematical model has been developed for calculating t...
Aug 25, 2022Open Access
Based on the existing basic theories of thermodynamics, this paper uses the physical thought contained in the entropy balance equation itself to spread it, and compare it with the laws of mass conservation and momentum conservation in mechanics, so as to obtain the wave equation satisfied by entropy. It is found that the thermodynamic entropy fluctuates in the system, and the solution of the wave equation is not a simple harmonic, but determined by the divergence of the term of the viscosity coe...
Nov 11, 2021Open Access
As we all know, it is Maxwell’s electromagnetic wave equation and Hertz’s electromagnetic wave experiment that make our mobile communication wonderful today! Since the electromagnetic wave has been widely used after research in the field of electromagnetism, is there a corresponding wave in the field of thermodynamics? Starting from the relevant equations in non-equi- librium thermodynamics works, in some special cases, the wave equation of micro element centroid velocity of thermodynamic system...
Dec 28, 2018Open Access
In this paper, the phase change material passive thermal management system for the lithium ion battery module is established, in which the mock-up battery is used to replace the real battery for the simulation. The temperature rise characteristics of the battery and the melting process of the phase change material in the passive thermal management system are determined through the numerical si ...
Jun 08, 2018Open Access
The objective of this study is to consider the flow of temperature dependent viscosity and thermal conductivity of free convective heat and mass transfer of viscoelastic fluid over a stretching surface with nth order of chemical reaction and thermophoresis. The effect of the temperature dependent dynamic viscosity and thermal conductivity together with modified thermal and solutal Grashof numbers are properly ...
May 14, 2015Open Access
Based on the idea of that particle decay represents nothing but a kind of
thermodynamic process due to its spontaneity, we here explore a new kind of
heat engine: particle Carnot engine (PCE), which satisfies Carnot’s theorem.
The result shows that any single particle carries its quantized intrinsic
entropy, and the total entropy never decreases for any decay process. Particle
thermodynamic laws analogous to the usual ones are proposed, among which the
momentum conservation principle is speciall...
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