MULTISCALE ISSUES IN DNS OF MULTIPHASE FLOWS

作     者：G.Tryggvason S.Thomas B.Aboulhasanzadeh 

作者机构：Worcester Polytechnic Institute 

出 版 物：《Acta Mathematica Scientia》 (数学物理学报（B辑英文版）)

年 卷 期：2010年第30卷第2期

页      面：551-562页

核心收录：

学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 080704[工学-流体机械及工程] 08[工学] 0828[工学-农业工程] 0807[工学-动力工程及工程热物理] 09[农学] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0701[理学-数学] 

主　　题：direct numerical simulations multiphase flow multiscale problems 

摘      要：Direct numerical simulations （DNS） have now become a well established tool to examine complex multiphase flows. Such flows typically exhibit a large range of scales and it is generally necessary to use different descriptions of the flow depending on the scale that we are examining. Here we discuss multiphase flows from a multiscale perspective. Those include both how DNS are providing insight and understanding for modeling of scales much larger than the ＂dominant scale＂ （defined where surface tension, viscous forces or inertia are important）, as well as how DNS are often limited by the need to resolve processes taking place on much smaller scales. Both problems can be cast into a language introduced for general classes of multiscale problems and reveal that while the classification may be new, the issues are not.