The model constant A of the eddy dissipation model Online publication date: Sat, 05-Mar-2016
by Peiyong Wang
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 16, No. 2, 2016
Abstract: The eddy dissipation model has been used extensively in turbulent combustion modelling because of its simplicity, good convergence, and reasonable accuracy. The model constant A with the standard value 4 has been used in numerous CFD applications without verification and validation. A systematic investigation of the model constant A has been carried out here. Eleven turbulent diffusion flames including round jet flames and opposed jet flames are CFD simulated and the simulation results are compared with experimental data. It is revealed that the flame temperature predicted with A = 4 deviates from experimental data severely. An optimal A value can be found to match experimental data for each flame; this value depends on fuel, chemistry, and the turbulence strength of combustion flow field; it varies between 0.77 and 25 for the 11 flames. A correlation of optimal A value with turbulent Reynolds number is presented; a modification to the original eddy dissipation model is also presented and validated.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the Progress in Computational Fluid Dynamics, An International Journal (PCFD):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook