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Alexander Scheuermann - One of the best experts on this subject based on the ideXlab platform.

  • slip Flow lattice boltzmann simulations in Ducts and porous media a full rehabilitation of spurious velocities
    Physical Review E, 2018
    Co-Authors: M Aminpour, S A Galindotorres, Alexander Scheuermann
    Abstract:

    Slip Flow in Ducts and porous media is simulated using lattice-Boltzmann method incorporated with interfacial force models. The dependence of the results on the viscosity, LBM scheme (D3Q15 and D3Q19) and the relaxation time model (single- or multirelaxation time) is investigated. The severity of spurious velocities (arisen from classic and advanced interfacial force models) is discussed that leads to entirely nonphysical results for whole Flow rates (0.027 (kappa/kappa(NS))square Ducts > (kappa/kappa(NS))porous media (where kappa is the permeability and NS denotes no-slip).

S A Galindotorres - One of the best experts on this subject based on the ideXlab platform.

  • slip Flow lattice boltzmann simulations in Ducts and porous media a full rehabilitation of spurious velocities
    Physical Review E, 2018
    Co-Authors: M Aminpour, S A Galindotorres, Alexander Scheuermann
    Abstract:

    Slip Flow in Ducts and porous media is simulated using lattice-Boltzmann method incorporated with interfacial force models. The dependence of the results on the viscosity, LBM scheme (D3Q15 and D3Q19) and the relaxation time model (single- or multirelaxation time) is investigated. The severity of spurious velocities (arisen from classic and advanced interfacial force models) is discussed that leads to entirely nonphysical results for whole Flow rates (0.027 (kappa/kappa(NS))square Ducts > (kappa/kappa(NS))porous media (where kappa is the permeability and NS denotes no-slip).

Andreas Dillmann - One of the best experts on this subject based on the ideXlab platform.

  • linear potential theory of steady internal supersonic Flow with quasi cylindrical geometry part 1 Flow in Ducts
    Journal of Fluid Mechanics, 1994
    Co-Authors: Andreas Dillmann
    Abstract:

    Based on linear potential theory, the general three-dimensional problem of steady supersonic Flow inside quasi-cylindrical Ducts is formulated as an initial-boundary-value problem for the wave equation, whose general solution arises as an infinite double series of the Fourier-Bessel type. For a broad class of solutions including the general axisymmetric case, it is shown that the presence of a discontinuity in wall slope leads to a periodic singularity pattern associated with non-uniform convergence of the corresponding series solutions, which thus are unsuitable for direct numerical computation. This practical difficulty is overcome by extending a classical analytical method, viz. Kummer's series transformation

A Viedma - One of the best experts on this subject based on the ideXlab platform.

  • generalized reynolds number and viscosity definitions for non newtonian fluid Flow in Ducts of non uniform cross section
    Experimental Thermal and Fluid Science, 2015
    Co-Authors: D Crespillorens, P G Vicente, A Viedma
    Abstract:

    Abstract This work presents and experimental study of the generalization method of the Reynolds number and the viscosity of pseudoplastic fluid Flow in Ducts of non-uniform cross-section. This method will permit to reduce 1 degree of freedom of hydrodynamical and thermal problems in those Ducts. A review of the state of the art has been undertaken and the generalization equation proposed for Ducts of uniform cross section has been used as a starting point. The results obtained with this equation have not been found satisfactory and a new one has been proposed. Specifically, the procedure has been developed for two models of scraped surface heat exchanger with reciprocating scrapers. For both models, the scraper consists of a concentric rod inserted in each tube of the heat exchanger, mounting an array of plugs that fit the inner tube wall. The two models studied differ in the design of the plug. The procedure to perform the generalization method out of experimental data is accurately detailed in the present document.

M Aminpour - One of the best experts on this subject based on the ideXlab platform.

  • slip Flow lattice boltzmann simulations in Ducts and porous media a full rehabilitation of spurious velocities
    Physical Review E, 2018
    Co-Authors: M Aminpour, S A Galindotorres, Alexander Scheuermann
    Abstract:

    Slip Flow in Ducts and porous media is simulated using lattice-Boltzmann method incorporated with interfacial force models. The dependence of the results on the viscosity, LBM scheme (D3Q15 and D3Q19) and the relaxation time model (single- or multirelaxation time) is investigated. The severity of spurious velocities (arisen from classic and advanced interfacial force models) is discussed that leads to entirely nonphysical results for whole Flow rates (0.027 (kappa/kappa(NS))square Ducts > (kappa/kappa(NS))porous media (where kappa is the permeability and NS denotes no-slip).