CFD-DEM predictions of heat transfer in packed beds using commercial and open source codes

Arpit Singhal, Schalk Cloete, Stefan Radl, Rosa Quinta Ferreira, Shahriar Amini

Abstract


Gas-particle heat transfer rates are investigated using particle-resolved direct numerical simulation (PR-DNS). We utilize a discrete element method (DEM) approach to first obtain a realistic packing of the particles, and then build a computational mesh based on these particle positions for running PR-DNS. A common challenge in such investigations is the overlap between particles, which can result in highly skewed cells. In this work, this problem is dealt with by shrinking the particles. Simulation results showed that changing the packing porosity by shrinking the particles by different amounts does not match recently proposed correlations. Particle arrangements produced in this way will over predict the heat transfer rate. When a random particle arrangement was simulated, however, results matched well with correlations. In addition, we find that DNS results using the commercial CFD code ANSYS FLUENT and the open-source code OpenFOAM® return very similar results. The computational performance was similar, with (i) OpenFOAM being faster for a fixed number of iterations, and (ii) ANSYS FLUENT requiring a smaller number of iterations to find convergence.

Full Text:

PDF

References


Gunn, D.J., Transfer of heat or mass to particles in fixed and fluidised beds. International Journal of Heat and Mass Transfer, 1978. 21(4): p. 467-476.

Tavassoli, H., E.A.J.F. Peters, and J.A.M. Kuipers, Direct numerical simulation of fluid–particle heat transfer in fixed random arrays of non-spherical particles. Chemical Engineering Science, 2015. 129: p. 42-48.

Deen, N.G., et al., Review of direct numerical simulation of fluid–particle mass, momentum and heat transfer in dense gas–solid flows. Chemical Engineering Science, 2014. 116: p. 710-724.

Sun, B., S. Tenneti, and S. Subramaniam, Modeling average gas–solid heat transfer using particle-resolved direct numerical simulation. International Journal of Heat and Mass Transfer, 2015. 86: p. 898-913.

Dixon, A.G., M. Nijemeisland, and E.H. Stitt, Systematic mesh development for 3D CFD simulation of fixed beds: Contact points study. Computers and Chemical Engineering, 2013. 48: p. 135-153.

Bai, H., et al., A Coupled DEM and CFD Simulation of Flow Field and Pressure Drop in Fixed Bed Reactor with Randomly Packed Catalyst Particles. Industrial and Engineering Chemistry Research, 2009. 48(8): p. 4060-4074.

Atmakidis, T. and E.Y. Kenig, CFD-based analysis of the wall effect on the pressure drop in packed beds with moderate tube/particle diameter ratios in the laminar flow regime. Chemical Engineering Journal, 2009. 155(1–2): p. 404-410.

Lopes, R.J.G. and R.M. Quinta-Ferreira, Numerical Simulation of Trickle-Bed Reactor Hydrodynamics with RANS-Based Models Using a Volume of Fluid Technique. Industrial and Engineering Chemistry Research, 2009. 48(4): p. 1740-1748.

Dixon, A.G. and M. Nijemeisland, CFD as a Design Tool for Fixed-Bed Reactors. Industrial and Engineering Chemistry Research, 2001. 40(23): p. 5246-5254.

Dixon, A.G., et al., 3D CFD simulations of steam reforming with resolved intraparticle reaction and gradients. Chemical Engineering Science, 2007. 62(18–20): p. 4963-4966.

Calis, H.P.A., et al., CFD modelling and experimental validation of pressure drop and flow profile in a novel structured catalytic reactor packing. Chemical Engineering Science, 2001. 56(4): p. 1713-1720.

Reddy, R.K. and J.B. Joshi, CFD modeling of pressure drop and drag coefficient in fixed and expanded beds. Chemical Engineering Research and Design, 2008. 86(5): p. 444-453.

Romkes, S.J.P., et al., CFD modelling and experimental validation of particle-to-fluid mass and heat transfer in a packed bed at very low channel to particle diameter ratio. Chemical Engineering Journal, 2003. 96(1–3): p. 3-13.

Soleymani, A., et al., Numerical Investigations of Fluid Flow and Lateral Fluid Dispersion in Bounded Granular Beds in a Cylindrical Coordinates System. Chemical Engineering and Technology, 2007. 30(10): p. 1369-1375.

Jafari, A., et al., Modeling and CFD simulation of flow behavior and dispersivity through randomly packed bed reactors. Chemical Engineering Journal, 2008. 144(3): p. 476-482.

Gunjal, P.R., V.V. Ranade, and R.V. Chaudhari, Computational study of a single-phase flow in packed beds of spheres. AIChE Journal, 2005. 51(2): p. 365-378.

Lee, J.J., et al., Turbulence-induced Heat Transfer in PBMR Core Using LES and RANS. Journal of Nuclear Science and Technology, 2007. 44(7): p. 985-996.

Deen, N.G., et al., Direct numerical simulation of flow and heat transfer in dense fluid–particle systems. Chemical Engineering Science, 2012. 81: p. 329-344.

W. E. Ranz and W. R. Marshall, J., "Vaporation from Drops, Part I". Chem. Eng. Prog., 1952. 48(3): p. 141–146.

Dixon, A.G., Heat Transfer in Fixed Beds at Very Low (<4) Tube-to-Particle Diameter Ratio. Industrial and Engineering Chemistry Research, 1997. 36(8): p. 3053-3064.

Smirnov, E.I., et al., Radial heat transfer in packed beds of spheres, cylinders and Rashig rings: Verification of model with a linear variation of λer in the vicinity of the wall. Chemical Engineering Journal, 2003. 91(2–3): p. 243-248.


Refbacks

  • There are currently no refbacks.


MAYFEB Journal of Chemistry and Chemical Engineering

MAYFEB TECHNOLOGY DEVELOPMENT

Toronto, Ontario, Canada

ISSN 2560-693X