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dc.contributor.authorMuniz, André Rodriguespt_BR
dc.contributor.authorSecchi, Argimiro Resendept_BR
dc.contributor.authorCardozo, Nilo Sérgio Medeirospt_BR
dc.date.accessioned2011-07-30T06:01:34Zpt_BR
dc.date.issued2008pt_BR
dc.identifier.issn0104-6632pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/30444pt_BR
dc.description.abstractComputational Fluid Dynamics (CFD) is widely used by polymer processing industries in order to evaluate polymeric fluid flows. A successful computational code must provide reliable predictions (modeling) in a fast and efficient way (simulation). In this work, a new approach to solve the governing equations of viscoelastic fluid flows is proposed. It is based on the finite-volume method with collocated arrangement of the variables, using high-order approximations for the linear and nonlinear average fluxes in the interfaces and for the nonlinear terms obtained from the discretization of the constitutive equations. The approximations are coupled to the Weighted Essentially Non-Oscillatory (WENO) scheme to avoid oscillations in the solution. The Oldroyd-B model is used to describe the rheological behavior of the viscoelastic fluid. The average values of the variables in the volumes are used during the resolution, and the point values are recovered in the post-processing step by deconvolution of the average values. The nonlinear system, resulting from the discretization of the equations, is solved simultaneously using a Newton-like method. The obtained solutions are oscillation-free and accurate, demonstrated by the application on a classic problem in computational fluid dynamics, the slip-stick flow.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofBrazilian journal of chemical engineering. São Paulo, SP. vol. 25, no. 01 (Jan./Mar. 2008), p. 153-166pt_BR
dc.rightsOpen Accessen
dc.subjectPolímerospt_BR
dc.subjectNon-newtonian fluidsen
dc.subjectViscoelasticityen
dc.subjectViscoelasticidadept_BR
dc.subjectMecânica dos fluidospt_BR
dc.subjectFinite-volume methoden
dc.subjectHigh-order interpolation schemesen
dc.subjectVolumes finitospt_BR
dc.subjectWENO schemeen
dc.titleHigh-order finite volume method for solving viscoelastic fluid flowspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000638701pt_BR
dc.type.originNacionalpt_BR


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