Momentum, heat and mass transfer simulations of bounded dense mono-dispersed gas-particle systems

Federico Municchi, Stefan Radl

Research output: Contribution to journalArticle

Abstract

Particle Resolved Direct Numerical Simulation (PR-DNS) is employed to study momentum, heat and mass transfer in confined gas-particle suspensions. In this work, we show that the presence of wall boundaries induces an inhomogeneous
particle distribution, and as a consequence continuous phase fields exhibit peculiar profiles in the wall-normal direction. Therefore, we first propose a correlation for the particle volume fraction as a function of the distance from the wall and the bulk particle concentration. Secondly, we quantify wall effects on flow field and interphase transfer coeffcients (i.e., the flow field, a scalar field, as well as the Nusselt number and drag coeffcient). We show that these effects do not depend significantly on the Reynolds number in case an appropriate scaling is applied. Finally, we propose correlations to reconstruct the continuous phase fields in the proximity of adiabatic walls. Also, we provide interpolation tables for the correction to the drag force and the Nusselt number that are helpful in unresolved Euler-Lagrange simulations.
Original languageEnglish
Pages (from-to)1146-1161
JournalInternational Journal of Heat and Mass Transfer
Volume120
DOIs
Publication statusPublished - 2018

Keywords

  • heat transfer
  • direct numerical simulation
  • Euler-Lagrange-Lagrange simulation

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Computational Mechanics

Fields of Expertise

  • Information, Communication & Computing

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