Closure scheme for stably stratified turbulence without critical Richardson number

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F22%3A00559508" target="_blank" >RIV/67985840:_____/22:00559508 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s42452-022-05088-8" target="_blank" >https://doi.org/10.1007/s42452-022-05088-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s42452-022-05088-8" target="_blank" >10.1007/s42452-022-05088-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Closure scheme for stably stratified turbulence without critical Richardson number

Popis výsledku v původním jazyce

This paper presents a new modification of the second order turbulence closure that removes the critical gradient Richardson number limitation typically found in Mellor-Yamada style models. The mean wind speed and potential temperature profiles are derived for the newly modified model in terms of similarity and structure functions depending on the gradient Richardson number. The derivation is based on a second order boundary layer approximation in neutral to very stable stratification conditions. Some recent closure assumptions for pressure-temperature and heat flux are considered. Variances and covariances of the turbulent fluctuations are also investigated with respect to the gradient Richardson number. The new model predictions are confronted with some well known models.

Název v anglickém jazyce

Closure scheme for stably stratified turbulence without critical Richardson number

Popis výsledku anglicky

This paper presents a new modification of the second order turbulence closure that removes the critical gradient Richardson number limitation typically found in Mellor-Yamada style models. The mean wind speed and potential temperature profiles are derived for the newly modified model in terms of similarity and structure functions depending on the gradient Richardson number. The derivation is based on a second order boundary layer approximation in neutral to very stable stratification conditions. Some recent closure assumptions for pressure-temperature and heat flux are considered. Variances and covariances of the turbulent fluctuations are also investigated with respect to the gradient Richardson number. The new model predictions are confronted with some well known models.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10101 - Pure mathematics

Projekt

<a href="/cs/project/GA19-04243S" target="_blank" >GA19-04243S: Parciální diferenciální rovnice v mechanice a termodynamice tekutin</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

SN Applied Sciences

ISSN

2523-3963

e-ISSN

—

Svazek periodika

4

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

214

Kód UT WoS článku

000822371800013

EID výsledku v databázi Scopus

2-s2.0-85133699889