Differential diffusion of passive scalars with MMC mixing model in isotropic turbulent flow

Dialameh, L., Sundaram, B., Cleary, M. J. and Klimenko, A. Y. (2012). Differential diffusion of passive scalars with MMC mixing model in isotropic turbulent flow. In: P. A. Brandner and B. W. Pearce, Proceedings of the 18th Australasian Fluid Mechanics Conference. 18th Australasian Fluid Mechanics Conference (AFMC), Launceston, Australia, (). 3-7 December 2012.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
Author Dialameh, L.
Sundaram, B.
Cleary, M. J.
Klimenko, A. Y.
Title of paper Differential diffusion of passive scalars with MMC mixing model in isotropic turbulent flow
Conference name 18th Australasian Fluid Mechanics Conference (AFMC)
Conference location Launceston, Australia
Conference dates 3-7 December 2012
Proceedings title Proceedings of the 18th Australasian Fluid Mechanics Conference
Place of Publication Hawthorn, VIC, Australia
Publisher Australasian Fluid Mechanics Society
Publication Year 2012
Sub-type Fully published paper
ISBN 9780646583730
Editor P. A. Brandner
B. W. Pearce
Total pages 4
Collection year 2013
Language eng
Abstract/Summary In theoretical models of turbulent mixing it is commonly assumed that the molecular diffusivities of all species are equal or that molecular diffusion is small compared with turbulent diffusion and that the effect of ignoring differences in the former is minor. The evidence suggests, however, that there are many situations where this simplification is not applicable. In this work the differential diffusion effects of passive scalars in statisticallystationary, isotropic turbulent flow are considered along with a modification to the multiple mapping conditioning (MMC) mixing model to account for these effects. Starting from identical initial conditions, each passive scalar field becomes self –similar with its variance decaying exponentially in time. The decay of the correlation coefficient between two mixing scalars with different diffusivities is then investigated and the results are compared with observations from previous DNS data available in the literature.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Paper 318.

 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Mon, 11 Mar 2013, 16:08:35 EST by Katie Gollschewski on behalf of School of Mechanical and Mining Engineering