CFD simulations of complex fluid flow in gas-solid fluidized bed using modified k-ϵ turbulence models

Asyari Daryus, Ahmad Indra Siswantara, Budiarso, Budi Sumartono, Gun Gun R. Gunadi, Hariyotejo Pujowidodo, Candra D. Widiawaty

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This work studies the effect of kinetic Prandtl value in the k-ϵ turbulence model transport equation on the characteristics of fluidized bed fluid flow. The research was conducted using CFD simulation method. Three kinetic Prandtl values were chosen, namely 0.8; 0.9 and 1.1; plus 1 from the default value of the turbulent model. The parameters observed were the difference in pressure in the bed, and several turbulence parameters, i.e. the rate of dissipation, the effective viscosity of the gas and the particles. The turbulent model with k-Prandtl of 0.9 gives the most accurate results at the superficial velocity range of 0.40 m/s - 0.70 m/s, while k-Prandtl of 1.1 gives most accurate results at the superficial velocity range of 0.80 m/s - 0.90 m/s. It is found that the decrease in the k-Prandtl value causes the decrease in the dissipation rate; same phenomena with effective viscosity of gas. Meanwhile, there is no significant change in the particle's effective viscosity with the change of k-Prandtl value.

Original languageEnglish
Title of host publicationInnovative Science and Technology in Mechanical Engineering for Industry 4.0
Subtitle of host publicationProceedings of the 4th International Conference on Mechanical Engineering, ICOME 2019
EditorsVivien Djanali, Fahmi Mubarok, Bambang Pramujati, Suwarno
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419346
DOIs
Publication statusPublished - 10 Dec 2019
Event4th International Conference on Mechanical Engineering: Innovative Science and Technology in Mechanical Engineering for Industry 4.0, ICOME 2019 - Yogyakarta, Indonesia
Duration: 28 Aug 201929 Aug 2019

Publication series

NameAIP Conference Proceedings
Volume2187
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Conference on Mechanical Engineering: Innovative Science and Technology in Mechanical Engineering for Industry 4.0, ICOME 2019
CountryIndonesia
CityYogyakarta
Period28/08/1929/08/19

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