A1 Journal article (refereed), original research

A comparison of turbulence models and two and three dimensional meshes for unsteady CFD ash deposition tools


Open Access hybrid publication

Publication Details
Authors: García Pérez Manuel, Vakkilainen Esa
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Fuel
Volume number: 237
Issue number: 1
Start page: 806
End page: 811
Number of pages: 6
ISSN: 0016-2361
eISSN: 1873-7153
JUFO-Level of this publication: 2
Open Access: Open Access hybrid publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2018101938506

Abstract

This work aims to assess the adequacy of the often made two dimensional mesh simplification in ash deposition models. Little information is available regarding its validity due to the heavy computational costs that a proper three-dimensional grid model would entail. We have implemented a case study (a deposition probe in a kraft recovery furnace) with 2D and 3D mesh models in order to compare their results regarding the ash deposition and the fluid flow. An additional simulation has been carried out to compare the results between URANS and DES turbulence models.

For the particular case studied in this article, the two-dimensional simplification is justified as the results did not vary notably whereas entailing remarkably smaller computational costs. Nonetheless, the usage of DES turbulence model yielded moderately different results, qualitatively closer to deposit observations, justifying perhaps the three-dimensional approach when accuracy is needed for the deposition of fine particles on the lee edges of the tubes.


Last updated on 2020-20-03 at 10:03