Entropy generation in multifield flows: Equations and examples of applications

Kockum H.; Jernqvist A.

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Entropy generation in multifield flows: Equations and examples of applications

机译：在multifield流熵代:方程和示例应用程序

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A general steady-stare entropy field equation and its corresponding jump conditions for multifield, multicomponent one-dimensional flows with heat and mass transfer are derived. In so doing, use has been made of the stationary field equations of species continuity, total continuity, momentum, and total energy, as well as canonical thermodynamic relations. Using the general equations, an expression for the rate of entropy generation in separated steady-state two-phase flow with entrainment is presented. Two examples of applications to this type of flow are given: estimation of void fraction based on the principle of minimum entropy generation at stationary states, and estimation of the thermodynamically optimal tube diameter for specified mass and heat flow rates (thermodynamic design of tubes). [References: 25]

机译：一般steady-stare熵方程和领域其相应的跳multifield条件,多组分一维流动和热量传质。已经固定的场方程物种的连续性,总连续性,动能和总能量,以及规范热力学关系。方程,熵率的表达式代在稳态两相分离流和雾沫。给出了这种类型的流的应用程序:空隙率估计的基础上最小熵产生原理静止的状态,和估计的热动力最佳管直径指定的质量和热流率(热力学管的设计)。

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来源
《Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers》 |1998年第2期|210-222|共13页
作者
Kockum H.; Jernqvist A.;
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作者单位

Univ Lund, Dept Chem Engn 1, POB 124, SE-22100 Lund, Sweden.;

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原文格式 PDF
正文语种英语
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One dimensional flow; void ratio; entropyFIELD EQUATIONSPIPE DIAMETERFlowtotal energyPlankton entrainmentheat and mass transfer;

机译：一维流动;孔隙比;entropyFIELDEQUATIONSPIPE DIAMETERFlowtotal energyPlanktonentrainmentheat传质;

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Entropy generation in multifield flows: Equations and examples of applications

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