RANS simulations of turbulent stably stratified layers based on GEMIX experiments using CUPID code

Jungwoo Kim; Seung Jun Lee

RANS simulations of turbulent stably stratified layers based on GEMIX experiments using CUPID code

Jungwoo Kim
, Seung Jun Lee

Dept. of Mechanical System and Design Engineering

Korea Atomic Energy Research Institute

Research output: Contribution to conference › Paper › peer-review

Abstract

The prediction capability of CUPID was assessed based on GEMIX experiments. For both the unstratifiedand stably stratified conditions considered, the CUPID code shows reasonably good agreement with experimental data for time-averaged axial velocity. However, higher turbulent kinetic energy for the confined wake configuration was not well predicted by CUPID with k RANS model, which becomes worse in the stably stratified conditions. With the tuning of the model constant C based on the experimental data, the prediction capability of CUPID is shown to improve the estimation of the turbulent kinetic energy in stably stratified conditions.

Original language	English
State	Published - 2017
Event	17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2017 - Xi'an, Shaanxi, China Duration: 3 Sep 2017 → 8 Sep 2017

Conference

Conference	17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2017
Country/Territory	China
City	Xi'an, Shaanxi
Period	3/09/17 → 8/09/17

Keywords

CUPID
GEMIX
K RANS model
The model constant C
Turbulent stably stratified layers

Cite this

@conference{3d0f90a98ece410385b26d9bd46135df,

title = "RANS simulations of turbulent stably stratified layers based on GEMIX experiments using CUPID code",

abstract = "The prediction capability of CUPID was assessed based on GEMIX experiments. For both the unstratifiedand stably stratified conditions considered, the CUPID code shows reasonably good agreement with experimental data for time-averaged axial velocity. However, higher turbulent kinetic energy for the confined wake configuration was not well predicted by CUPID with k RANS model, which becomes worse in the stably stratified conditions. With the tuning of the model constant C based on the experimental data, the prediction capability of CUPID is shown to improve the estimation of the turbulent kinetic energy in stably stratified conditions.",

keywords = "CUPID, GEMIX, K RANS model, The model constant C, Turbulent stably stratified layers",

author = "Jungwoo Kim and Lee, \{Seung Jun\}",

note = "Publisher Copyright: {\textcopyright} 2016 Association for Computing Machinery Inc. All Rights Reserved.; 17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2017 ; Conference date: 03-09-2017 Through 08-09-2017",

year = "2017",

language = "English",

}

TY - CONF

T1 - RANS simulations of turbulent stably stratified layers based on GEMIX experiments using CUPID code

AU - Kim, Jungwoo

AU - Lee, Seung Jun

PY - 2017

Y1 - 2017

N2 - The prediction capability of CUPID was assessed based on GEMIX experiments. For both the unstratifiedand stably stratified conditions considered, the CUPID code shows reasonably good agreement with experimental data for time-averaged axial velocity. However, higher turbulent kinetic energy for the confined wake configuration was not well predicted by CUPID with k RANS model, which becomes worse in the stably stratified conditions. With the tuning of the model constant C based on the experimental data, the prediction capability of CUPID is shown to improve the estimation of the turbulent kinetic energy in stably stratified conditions.

AB - The prediction capability of CUPID was assessed based on GEMIX experiments. For both the unstratifiedand stably stratified conditions considered, the CUPID code shows reasonably good agreement with experimental data for time-averaged axial velocity. However, higher turbulent kinetic energy for the confined wake configuration was not well predicted by CUPID with k RANS model, which becomes worse in the stably stratified conditions. With the tuning of the model constant C based on the experimental data, the prediction capability of CUPID is shown to improve the estimation of the turbulent kinetic energy in stably stratified conditions.

KW - CUPID

KW - GEMIX

KW - K RANS model

KW - The model constant C

KW - Turbulent stably stratified layers

UR - https://www.scopus.com/pages/publications/85052521718

M3 - Paper

AN - SCOPUS:85052521718

T2 - 17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2017

Y2 - 3 September 2017 through 8 September 2017

ER -

RANS simulations of turbulent stably stratified layers based on GEMIX experiments using CUPID code

Abstract

Conference

Keywords

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