Affiliation:
1. Department of Aerospace Engineering, Texas A&M University, College Station, TX 77843-3141 e-mail:
Abstract
In simulating chemically reacting flows, the differential entropy inequality (the local form of the second law of thermodynamics) must be satisfied in addition to the differential mass, momentum, and energy balances. Previously, we have shown that entropy violations occur when using a global/reduced mechanism. Herein we show that entropy violations also occur when using a detailed/skeletal/reduced mechanism. Using a recent theorem of “Slattery et al. (2011, “Role of Differential Entropy Inequality in Chemically Reacting Flows,” Chem. Eng. Sci., 66(21), pp. 5236–5243),” we illustrate how to modify a reduced chemical kinetics model to automatically satisfy the differential entropy inequality. The numerical solution of a methane laminar flame was improved when using reduced chemical kinetics modified in this way. In addition, an ad hoc temperature limiter is no longer necessary.
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference18 articles.
1. Rate-Controlled Constrained-Equilibrium Theory of Chemical Reactions in Complex Systems;Progress Energy Combust. Sci.,1990
2. Entropy Production and Element Conservation in the Quasi-Steady-State Approximation;Combust. Flame,2004
3. Role of Differential Entropy Inequality in Chemically Reacting Flows;Chem. Eng. Sci.,2011
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献