A simple approach for effective CFD simulation of turbulent pipe transport of shear-thinning, power-law fluids

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dc.catalogadorjlo
dc.contributor.authorSoto Sáez, Jorge Ignacio
dc.contributor.authorMessa, G. V.
dc.contributor.authorMalin, M. R.
dc.contributor.authorBrevis Vergara, Wernher Ariel
dc.date.accessioned2025-08-28T18:45:24Z
dc.date.available2025-08-28T18:45:24Z
dc.date.issued2026
dc.description.abstractThis study presents a simple, efficient approach for the CFD simulation of turbulent pipe transport of shear-thinning, power-law fluids. The method is developed within the Newtonian-based Reynolds-Averaged Navier-Stokes (RANS) framework, and it relies on a modification to the Reynolds-averaged apparent viscosity function to compensate for errors induced by the non-decomposition of the instantaneous apparent viscosity, as well as for the use of turbulence models developed for Newtonian fluids. Specifically, the Reynolds-averaged apparent viscosity switches from a power law to a logarithmic function for averaged shear rates below a threshold value, called the “critical shear rate”, which becomes a calibration parameter of the model. The new framework was tested against DNS data reported in the literature for different pipe-flow conditions, covering combinations of flow index  and friction Reynolds number , as well as against well-established correlations for the friction factor, with the analysis extended to cases up to  and . The analysis was conducted by employing three different turbulence models, namely Lam-Bremhorst k-ε, two-layer k-ε, and k-ω SST, which all rely on a low-Reynolds number treatment to obtain a detailed flow description in the near-wall region. The proposed approach appears attractive from an engineering standpoint, as it allows obtaining reasonably accurate prediction of main features of turbulent pipe transport of shear-thinning, power-law fluids, with a simple mathematical formulation and a robust and easy-to-converge character that can make a difference for the application to more complex flows.
dc.format.extent24 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.apm.2025.116324
dc.identifier.eissn1872-8480
dc.identifier.urihttps://doi.org/10.1016/j.apm.2025.116324
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/105334
dc.information.autorucEscuela de Ingeniería; Soto Sáez, Jorge Ignacio; S/I; 1098595
dc.information.autorucEscuela de Ingeniería; Brevis Vergara, Wernher Ariel; 0000-0001-8161-4677; 1059019
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaApplied Mathematical Modelling
dc.rightsacceso restringido
dc.subjectShear-thinning
dc.subjectPower-law
dc.subjectTurbulent flow
dc.subjectPipe-flow
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.titleA simple approach for effective CFD simulation of turbulent pipe transport of shear-thinning, power-law fluids
dc.typeartículo
dc.volumen150
sipa.codpersvinculados1098595
sipa.codpersvinculados1059019
sipa.trazabilidadORCID;2025-08-22
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