Evaluation of interphase drag models for the determination of gas hold-up of an air-water system in a spouted bed using CFD

Jaime A Riera Ortiz, Susana Zeppieri, Luis Rojas-Solorzano, Sylvana Derjani-Bayeh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The hydrodynamics of a dispersed air-water system within a spouted column with a concentric draft tube and a conical base is simulated using CFD based on a two-fluid Euler-Euler (E-E) modeling framework and k-ε two-equation turbulence closure. The interaction between the dispersed gas phase and the continuous liquid phase is characterized by bubble-liquid interphase forces (drag, turbulent dispersion and lift forces). The Ishii-Zuber drag model [1] and Grace adjusted drag model [2], the latter represented by: CD Grace,dense = υg pCGrace, are compared for their capability to match experimental gas hold-up. Numerical results of Reynolds-averaged Navier-Stokes equations with k-ε two-equation turbulence closure model when compared with Pironti experimental data [3] indicated that both drag models, predicted the air hold-up within experimental errors. Furthermore, Ishii-Zuber liquid-gas drag model consistently provided better agreement with experimental results; it correctly determines the hold-up within 0.14%. Numerical agreement with adjusted Grace liquid-gas drag model, is exponent dependent (4 ≤ p ≤-0.5), turning down that the best computed hold-up is within 0.44% for p=0.5.

Original languageEnglish
Pages (from-to)269-281
Number of pages13
JournalJournal of Computational Methods in Sciences and Engineering
Volume12
Issue number4-6
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Drag
Computational fluid dynamics
Water
Evaluation
Air
Gases
Liquid
Liquids
Euler
Turbulence
Closure
Model
Drag Force
Reynolds Equation
Concentric
Bubbles (in fluids)
Bubble
Navier Stokes equations
Gas
Hydrodynamics

Keywords

  • CFD
  • holdup
  • interfacial drag models
  • k-ε
  • spouted bed column

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Mathematics
  • Engineering(all)

Cite this

Evaluation of interphase drag models for the determination of gas hold-up of an air-water system in a spouted bed using CFD. / Ortiz, Jaime A Riera; Zeppieri, Susana; Rojas-Solorzano, Luis; Derjani-Bayeh, Sylvana.

In: Journal of Computational Methods in Sciences and Engineering, Vol. 12, No. 4-6, 2012, p. 269-281.

Research output: Contribution to journalArticle

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