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contributor authorR. R. Nourgaliev
contributor authorAdjunct Assistant Professor
contributor authorT. N. Dinh
contributor authorAdjunct Associate Professor
contributor authorT. G. Theofanous
date accessioned2017-05-09T00:13:24Z
date available2017-05-09T00:13:24Z
date copyrightJuly, 2004
date issued2004
identifier issn0098-2202
identifier otherJFEGA4-27199#586_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/130227
description abstractRecently, Eulerian methods for capturing interfaces in multi-fluid problems become increasingly popular. While these methods can effectively handle significant deformations of interface, the treatment of the boundary conditions in certain classes of compressible flows are known to produce nonphysical oscillations due to the radical change in equation of state across the material interface. One promising recent development to overcome these problems is the Ghost Fluid Method (GFM). The present study initiates a new methodology for boundary condition capturing in multifluid compressible flows. The method, named Characteristics-Based Matching (CBM), capitalizes on recent developments of the level set method and related techniques, i.e., PDE-based re-initialization and extrapolation, and the Ghost Fluid Method (GFM). Specifically, the CBM utilizes the level set function to capture interface position and a GFM-like strategy to tag computational nodes. In difference to the GFM method, which employs a boundary condition capturing in primitive variables, the CBM method implements boundary conditions based on a characteristic decomposition in the direction normal to the boundary. In this way overspecification of boundary conditions is avoided and we believe so will be spurious oscillations. In this paper, we treat (moving or stationary) fluid-solid interfaces and present numerical results for a select set of test cases. Extension to fluid-fluid interfaces will be presented in a subsequent paper.
publisherThe American Society of Mechanical Engineers (ASME)
titleThe Characteristics-Based Matching (CBM) Method for Compressible Flow With Moving Boundaries and Interfaces
typeJournal Paper
journal volume126
journal issue4
journal titleJournal of Fluids Engineering
identifier doi10.1115/1.1778713
journal fristpage586
journal lastpage604
identifier eissn1528-901X
keywordsPressure
keywordsFlow (Dynamics)
keywordsFluids
keywordsReflection
keywordsSimulation
keywordsShock (Mechanics)
keywordsBoundary-value problems
keywordsCompressible flow
keywordsEquations
keywordsErrors
keywordsDensity
keywordsWaves
keywordsOscillations
keywordsRelaxation (Physics) AND Equations of state
treeJournal of Fluids Engineering:;2004:;volume( 126 ):;issue: 004
contenttypeFulltext


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