Influence of local grid refinement on prediction of impinging jet heat transfer using Scale-Resolving-Simulation methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F22%3A00010951" target="_blank" >RIV/46747885:24210/22:00010951 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21730/22:00358941

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2214157X22004051?via=ihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214157X22004051?via=ihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.csite.2022.102159" target="_blank" >10.1016/j.csite.2022.102159</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of local grid refinement on prediction of impinging jet heat transfer using Scale-Resolving-Simulation methods

Popis výsledku v původním jazyce

A fine near-wall resolution plays a crucial role in simulations of unsteady heat transfer from a wall. A generation of fine structured grids for a complex domain is cumbersome and requires an enormous number of grid points and a local grid refinement is a possible technique for a grid point reduction. The present study addresses numerical simulations of impinging jet heat transfer on locally refined computational grids using the Scale-Resolving-Simulation methods (DES, LES and PANS). The study is performed at a Reynolds number Re = 23000 and two nozzle-plate distances H/D = 2 and H/D = 6. DES and the PANS model with f(k) = 0.25 predicted results closest to experimental data. However, DES significantly over-predicted heat transfer at the location r/D = 1 - 2 in the small nozzle-plate distance case (H/D = 2). The decrease of physical resolution in the PANS model resulted in the over-prediction of heat transfer close to the nozzle axis. In conclusion, the influence of the local refinement in the perpendicular direction was rather low compared to the longitudinal direction. Moreover, the local grid refinement improved results predicted by LES and DES in the small nozzle-plate distance case.

Název v anglickém jazyce

Influence of local grid refinement on prediction of impinging jet heat transfer using Scale-Resolving-Simulation methods

Popis výsledku anglicky

A fine near-wall resolution plays a crucial role in simulations of unsteady heat transfer from a wall. A generation of fine structured grids for a complex domain is cumbersome and requires an enormous number of grid points and a local grid refinement is a possible technique for a grid point reduction. The present study addresses numerical simulations of impinging jet heat transfer on locally refined computational grids using the Scale-Resolving-Simulation methods (DES, LES and PANS). The study is performed at a Reynolds number Re = 23000 and two nozzle-plate distances H/D = 2 and H/D = 6. DES and the PANS model with f(k) = 0.25 predicted results closest to experimental data. However, DES significantly over-predicted heat transfer at the location r/D = 1 - 2 in the small nozzle-plate distance case (H/D = 2). The decrease of physical resolution in the PANS model resulted in the over-prediction of heat transfer close to the nozzle axis. In conclusion, the influence of the local refinement in the perpendicular direction was rather low compared to the longitudinal direction. Moreover, the local grid refinement improved results predicted by LES and DES in the small nozzle-plate distance case.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/EF16_019%2F0000843" target="_blank" >EF16_019/0000843: Hybridní materiály pro hierarchické struktury</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Case Studies in Thermal Engineering

ISSN

2214-157X

e-ISSN

—

Svazek periodika

36

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

000823268900006

EID výsledku v databázi Scopus

2-s2.0-85133806667