Two-Fluid-Model-Based Full Physics Simulations of Mixing in Noncohesive Wet Fluidized Beds

Maryam Askarishahi, Mohammad Sadegh Salehi, Stefan Radl

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Mixing in a noncohesive wet fluidized bed was studied using the two-fluid model (TFM) and a zero-dimensional (0D) approach. The employed TFM was extended to simulate droplet deposition on the particles, droplet evaporation, and particle drying. To quantify the bed uniformity, the variance of temperature and the particles' loss on drying (LoD) field were computed. Subsequently, our TFM simulation data is used to support the assumptions adopted in our 0D model. Specifically, the simulation results suggest the formation of two well-mixed zones: a spraying/wetting zone and a drying zone. Furthermore, it was demonstrated that the 0D model can accurately predict the gas and particle temperatures, as well as the moisture content with a maximum error of 4.3% when the following criteria are met: (i) low enough temperature and LoD variance (i.e., less than 5%); (ii) deep droplet penetration into the bed; (iii) no droplet loss.

Original languageEnglish
Pages (from-to)12323-12346
Number of pages24
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number27
DOIs
Publication statusPublished - 10 Jul 2019

Fingerprint

Fluidized beds
Physics
Drying
Fluids
Spraying
Temperature
Wetting
Evaporation
Moisture
Gases

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Two-Fluid-Model-Based Full Physics Simulations of Mixing in Noncohesive Wet Fluidized Beds. / Askarishahi, Maryam; Salehi, Mohammad Sadegh; Radl, Stefan.

In: Industrial and Engineering Chemistry Research, Vol. 58, No. 27, 10.07.2019, p. 12323-12346.

Research output: Contribution to journalArticleResearchpeer-review

@article{e9ea5937ec514c28aaa2548ebc4c4e44,
title = "Two-Fluid-Model-Based Full Physics Simulations of Mixing in Noncohesive Wet Fluidized Beds",
abstract = "Mixing in a noncohesive wet fluidized bed was studied using the two-fluid model (TFM) and a zero-dimensional (0D) approach. The employed TFM was extended to simulate droplet deposition on the particles, droplet evaporation, and particle drying. To quantify the bed uniformity, the variance of temperature and the particles' loss on drying (LoD) field were computed. Subsequently, our TFM simulation data is used to support the assumptions adopted in our 0D model. Specifically, the simulation results suggest the formation of two well-mixed zones: a spraying/wetting zone and a drying zone. Furthermore, it was demonstrated that the 0D model can accurately predict the gas and particle temperatures, as well as the moisture content with a maximum error of 4.3{\%} when the following criteria are met: (i) low enough temperature and LoD variance (i.e., less than 5{\%}); (ii) deep droplet penetration into the bed; (iii) no droplet loss.",
author = "Maryam Askarishahi and Salehi, {Mohammad Sadegh} and Stefan Radl",
year = "2019",
month = "7",
day = "10",
doi = "10.1021/acs.iecr.9b01344",
language = "English",
volume = "58",
pages = "12323--12346",
journal = "Industrial & engineering chemistry research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "27",

}

TY - JOUR

T1 - Two-Fluid-Model-Based Full Physics Simulations of Mixing in Noncohesive Wet Fluidized Beds

AU - Askarishahi, Maryam

AU - Salehi, Mohammad Sadegh

AU - Radl, Stefan

PY - 2019/7/10

Y1 - 2019/7/10

N2 - Mixing in a noncohesive wet fluidized bed was studied using the two-fluid model (TFM) and a zero-dimensional (0D) approach. The employed TFM was extended to simulate droplet deposition on the particles, droplet evaporation, and particle drying. To quantify the bed uniformity, the variance of temperature and the particles' loss on drying (LoD) field were computed. Subsequently, our TFM simulation data is used to support the assumptions adopted in our 0D model. Specifically, the simulation results suggest the formation of two well-mixed zones: a spraying/wetting zone and a drying zone. Furthermore, it was demonstrated that the 0D model can accurately predict the gas and particle temperatures, as well as the moisture content with a maximum error of 4.3% when the following criteria are met: (i) low enough temperature and LoD variance (i.e., less than 5%); (ii) deep droplet penetration into the bed; (iii) no droplet loss.

AB - Mixing in a noncohesive wet fluidized bed was studied using the two-fluid model (TFM) and a zero-dimensional (0D) approach. The employed TFM was extended to simulate droplet deposition on the particles, droplet evaporation, and particle drying. To quantify the bed uniformity, the variance of temperature and the particles' loss on drying (LoD) field were computed. Subsequently, our TFM simulation data is used to support the assumptions adopted in our 0D model. Specifically, the simulation results suggest the formation of two well-mixed zones: a spraying/wetting zone and a drying zone. Furthermore, it was demonstrated that the 0D model can accurately predict the gas and particle temperatures, as well as the moisture content with a maximum error of 4.3% when the following criteria are met: (i) low enough temperature and LoD variance (i.e., less than 5%); (ii) deep droplet penetration into the bed; (iii) no droplet loss.

UR - http://www.scopus.com/inward/record.url?scp=85073660553&partnerID=8YFLogxK

U2 - 10.1021/acs.iecr.9b01344

DO - 10.1021/acs.iecr.9b01344

M3 - Article

VL - 58

SP - 12323

EP - 12346

JO - Industrial & engineering chemistry research

JF - Industrial & engineering chemistry research

SN - 0888-5885

IS - 27

ER -