Identification

Title

Statistical Closure to Derive a Subgrid-scale Modeling for Large Eddy Simulations of Three-dimensional Turbulence

Abstract

A subgrid-scale modeling for the velocity field of threedimensional turbulence has been derived from a two-point closure by Chollet and Lesieur (1981); this model has been used in both two-point closure computations and direct numerical simulations of large scales. The same method is extended to the passive scalar, deriving an eddy diffusivity from the transfer of scalar variance through a given wave number kc. Some specific terms of the transfers are used to determine the modifications that the eddy quantities undergo because of the closeness of kc to dissipative or large scales. The eddy quantities can be split into two different contributions--an eddy viscosity (or diffusivity) and a higher-order dissipativity, the latter term corresponding to interactions between wave numbers in the neighborhood of the given wave number kc. Drastic differences between the dynamics of three- and two-dimensional turbulence are pointed out. The eddy quantities are used to parameterize the small scales of velocity and scalar fields, first in computations using the same two-point closure, then in direct numerical simulation of large scales.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7zs2vwh

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Keyword set

keyword value

EARTH SCIENCE SERVICES > MODELS

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > WIND DYNAMICS > TURBULENCE

originating controlled vocabulary

title

U.S. National Aeronautics and Space Administration Global Change Master Directory

reference date

date type

revision

effective date

2021-09-17

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

1983-01-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata date

2023-08-18T18:02:42.434985

Metadata language

eng; USA