Encyclopaedia Index

Multi-fluid model applied to confined diffusion flame


Sergei Zhubrin, CHAM Ltd, London, England

A paper to be published in PHOENICS Journal, January, 1999


Local heat and mass transfer properties are presented for a turbulent diffusion flame in confined co-axial jet flows.

The calculation procedure employs, a K - epsilon two-equation turbulence model for hydrodynamic part of simulations.

Calculations of mixing and combustion were performed with three models, characterised by instant reaction, instant reaction with scalar fluctuations and multi-fluid instant reaction: comparison with measurements obtained by Razdan and Stevens indicate the superiority of multi-fluid approach.

PLANT feature of PHOENICS 3.1 was used to implant the model formulations.


  1. Introduction
  2. Flow details
  3. Simulation details
  4. Combustion models
  5. Implementation
  6. Comparison with experiment
  7. Conclusion
  8. References
  9. Appendix: Q1 input file

1 Introduction

The concentration fluctuations in a turbulent confined jets have been recently analysed by way of Multi-Fluid Model invented by Brian Spalding [1]. The predictions have been found to be in satisfactory quantitative agreement with the measurements [2].

The present work extents the analysis to a more complicated flow, in which the turbulent mixing is followed by chemical reactions forming the steady, confined and physically controlled flame.

The main objective is to validate multi-fluid model performance to predict the features of gaseous combustion by comparison its results with existing models and experimental observations.

2 Flow details

The experimental data to be simulated are the results for the turbulent diffusion flame measurements of Razdan and Stevens [3], the main features of which are as follows: