File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: A discrete flux scheme for aerodynamic and hydrodynamic flows

TitleA discrete flux scheme for aerodynamic and hydrodynamic flows
Authors
KeywordsLattice Boltzmann equation
Aerodynamics
Hydrodynamics
Issue Date2011
Citation
Communications in Computational Physics, 2011, v. 9, n. 5, p. 1257-1283 How to Cite?
AbstractThe objective of this paper is to seek an alternative to the numerical simulation of the Navier-Stokes equations by a method similar to solving the BGK-type modeled lattice Boltzmann equation. The proposed method is valid for both gas and liquid flows. A discrete flux scheme (DFS) is used to derive the governing equations for two distribution functions; one for mass and another for thermal energy. These equations are derived by considering an infinitesimally small control volume with a velocity lattice representation for the distribution functions. The zero-order moment equation of the mass distribution function is used to recover the continuity equation, while the first-order moment equation recovers the linear momentum equation. The recovered equations are correct to the first order of the Knudsen number (Kn); thus, satisfying the continuum assumption. Similarly, the zero-order moment equation of the thermal energy distribution function is used to recover the thermal energy equation. For aerodynamic flows, it is shown that the finite difference solution of the DFS is equivalent to solving the lattice Boltzmann equation (LBE) with a BGK-type model and a specified equation of state. Thus formulated, the DFS can be used to simulate a variety of aerodynamic and hydrodynamic flows. Examples of classical aeroacoustics, compressible flow with shocks, incompressible isothermal and non-isothermal Couette flows, stratified flow in a cavity, and double diffusive flow inside a rectangle are used to demonstrate the validity and extent of the DFS. Very good to excellent agreement with known analytical and/or numerical solutions is obtained; thus lending evidence to the DFS approach as an alternative to solving the Navier-Stokes equations for fluid flow simulations. © 2011 Global-Science Press.
Persistent Identifierhttp://hdl.handle.net/10722/270327
ISSN
2023 Impact Factor: 2.6
2023 SCImago Journal Rankings: 1.176
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorFu, S. C.-
dc.contributor.authorSo, R. M.C.-
dc.contributor.authorLeung, W. W.F.-
dc.date.accessioned2019-05-27T03:57:18Z-
dc.date.available2019-05-27T03:57:18Z-
dc.date.issued2011-
dc.identifier.citationCommunications in Computational Physics, 2011, v. 9, n. 5, p. 1257-1283-
dc.identifier.issn1815-2406-
dc.identifier.urihttp://hdl.handle.net/10722/270327-
dc.description.abstractThe objective of this paper is to seek an alternative to the numerical simulation of the Navier-Stokes equations by a method similar to solving the BGK-type modeled lattice Boltzmann equation. The proposed method is valid for both gas and liquid flows. A discrete flux scheme (DFS) is used to derive the governing equations for two distribution functions; one for mass and another for thermal energy. These equations are derived by considering an infinitesimally small control volume with a velocity lattice representation for the distribution functions. The zero-order moment equation of the mass distribution function is used to recover the continuity equation, while the first-order moment equation recovers the linear momentum equation. The recovered equations are correct to the first order of the Knudsen number (Kn); thus, satisfying the continuum assumption. Similarly, the zero-order moment equation of the thermal energy distribution function is used to recover the thermal energy equation. For aerodynamic flows, it is shown that the finite difference solution of the DFS is equivalent to solving the lattice Boltzmann equation (LBE) with a BGK-type model and a specified equation of state. Thus formulated, the DFS can be used to simulate a variety of aerodynamic and hydrodynamic flows. Examples of classical aeroacoustics, compressible flow with shocks, incompressible isothermal and non-isothermal Couette flows, stratified flow in a cavity, and double diffusive flow inside a rectangle are used to demonstrate the validity and extent of the DFS. Very good to excellent agreement with known analytical and/or numerical solutions is obtained; thus lending evidence to the DFS approach as an alternative to solving the Navier-Stokes equations for fluid flow simulations. © 2011 Global-Science Press.-
dc.languageeng-
dc.relation.ispartofCommunications in Computational Physics-
dc.subjectLattice Boltzmann equation-
dc.subjectAerodynamics-
dc.subjectHydrodynamics-
dc.titleA discrete flux scheme for aerodynamic and hydrodynamic flows-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.4208/cicp.311009.241110s-
dc.identifier.scopuseid_2-s2.0-79952000893-
dc.identifier.volume9-
dc.identifier.issue5-
dc.identifier.spage1257-
dc.identifier.epage1283-
dc.identifier.eissn1991-7120-
dc.identifier.isiWOS:000292061900015-
dc.identifier.issnl1815-2406-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats