Radiation Matters in Fixed‐Bed CFD Simulations | Zendy

Wehinger Gregor D. | Zendy

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Radiation Matters in Fixed‐Bed CFD Simulations

Author(s) -

Wehinger Gregor D.

Publication year - 2019

Publication title -

chemie ingenieur technik

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.365

H-Index - 36

eISSN - 1522-2640

pISSN - 0009-286X

DOI - 10.1002/cite.201800179

Subject(s) - heat transfer , computational fluid dynamics , radiation , radiative transfer , mechanics , pellets , materials science , thermal radiation , nuclear engineering , particle (ecology) , thermodynamics , environmental science , physics , optics , engineering , composite material , geology , oceanography

Fixed‐bed reactors often operate at elevated temperatures, where radiation can be a significant heat‐transfer mechanism. Particle‐resolved CFD models fixed‐bed reactors on a very detailed macroscopic level. In this study, the contribution of radiative heat transfer is investigated in a 500‐mm bed of 7‐hole pellets. At industrially relevant temperatures (250 – 800 °C) and with a steam‐reforming gas‐phase mixture, the S2S and DOM radiation models were applied. Neglecting radiation results in temperatures being up to 6 % lower. In this case, the main driver is surface‐to‐surface (S2S) radiation. Additional modeling recommendations are given.

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