Campus Units

Chemical and Biological Engineering, Mechanical Engineering, Ames Laboratory

Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

11-2-2019

Journal or Book Title

Chemical Engineering Science

Volume

207

First Page

663

Last Page

671

DOI

10.1016/j.ces.2019.06.054

Abstract

The Eulerian–Eulerian two-fluid model is widely used for computational fluid dynamics simulations of gas–solid flows. For non-isothermal flows, the averaged conservation equations solved in the two-fluid model require closures for drag, gas–solid heat transfer, pseudo-turbulent velocity fluctuations and the pseudo-turbulent heat flux (PTHF). However, the pseudo-turbulence terms are usually neglected in two-fluid simulations due to the lack of accurate correlations. With the increase in computational power, closures for these terms are now available from particle-resolved direct-numerical simulation (PR-DNS). Here, the PTHF closure as well as the heat-transfer closure (i.e., the Nusselt number) extracted from PR-DNS are implemented in the two-fluid thermal energy equation in OpenFOAM. The implementation is validated by comparing the simulation results with the PR-DNS data for the temperature profiles. Based on the analysis of the thermal energy budget, the PTHF can have a significant contribution and neglecting it can lead to large errors.

Comments

This is a manuscript of an article published as Peng, C., B. Kong, J. Zhou, B. Sun, A. Passalacqua, S. Subramaniam, and R. O. Fox. "Implementation of pseudo-turbulence closures in an Eulerian–Eulerian two-fluid model for non-isothermal gas–solid flow." Chemical Engineering Science 207 (2019): 663-671. DOI: 10.1016/j.ces.2019.06.054. Posted with permission.

Copyright Owner

Elsevier Ltd.

Language

en

File Format

application/pdf

Published Version

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