Institute of Particle Science & Engineering

FACULTY OF ENGINEERING

 

Dr Tariq Mahmud

photo of Dr Mahmud Tariq Mahmud

Senior Lecturer in Chemical
Engineering
Tel: +44 (0) 113 3432431
E-mail: t.mahmud@leeds.ac.uk

Advanced Computational Fluid Dynamics Models for Transport Processes

Computational fluid dynamics, transport processes, heat and mass transfer, turbulent combustion, particle formation.

The main focus of my research activity is to improve upon the predictive capability and widen the applicability of the present generation of Computational Fluid Dynamics (CFD) models and to develop process models for integration with the CFD code.  Complementary experiments are being carried out to provide an enhanced understanding of the processes and to generate data for model validation.  The ultimate objective is to use advanced CFD models to gain insight into the complex fluid flow and associated transport processes in a wide range of process equipment and to provide a basis for their design and development.

Process Fluid Dynamics and Transport Processes

The research in this area involves investigations into fluid flow and transport processes problems relevant to the chemical and allied industries using experimental and (CFD) modelling techniques.  Current research interests include:

·     Advanced turbulence modelling for the computation of complex flows.

·     Modelling of multi-phase flow.

·     Gas-phase synthesis of nanoparticle.

·     Mass transfer in multi-phase systems.

·     Heat and mass transfer enhancement induced by swirling flow.

·     Hydrodynamics, mixing and heat transfer in stirred tank reactors.

Chemically Reacting Flows

Development of CFD based mathematical models for single and multi-phase chemically reacting turbulent flows - with special interest in the modelling of turbulence/chemistry interactions, precipitation and aerosol processes – for applications to chemical reactor modelling and design.

Combustion and Combustion Generated Pollutants

Development and application of CFD models for turbulent combustion and pollutant formation in practical combustion systems.  Current research interests include:

·     Modelling of turbulent premixed/non-premixed flames using laminar flamelet approaches.

·     Modelling of radiative heat transfer effects in turbulent flame calculation using a flamelet approach.

·     Particulates formation and burnout in heavy oil spray flames.

·     NOx formation in advanced low-NOx systems such as air-/fuel-staging, reburn, co-firing.

·     SOx formation, and reduction using in-furnace dry/wet-spray sorbent injections.

Selected Publications

  1. Lockwood, F. C., Mahmud, T. and Yehia, M., 1998, “Simulation of Pulverised Coal Test Fumace Performance”, FUEL, Vol. 77, No. 12, pp.1329-1337.
  2. Ma, C. Y., Mahmud, T., Gaskell, P. H. and Hampartsoumian, E., 1999, “Numerical Predictions of a Turbulent Diffusion Flame in a Cylindrical Combustor Using Eddy-Dissipation and Flamelet Combustion Models”, J. Mechanical Engineering Science, Part C, Vol. 213, pp 697-705.
  3. Ma, C. Y., Mahmud, T., Hampartsoumian, E., Richardson, J. and Gaskell, P. H., 2000, “Mathematical Modelling of Nitric Oxide Formation in Turbulent Diffusion Flames Doped with a Nitrogen Compound”, Combustion Science and Technology, Vol. 160, pp. 345-367.
  4. Zhu, J. M., Mahmud, T. and Javed, K. H., 2001, “Computational Modelling of Turbulent Mixing in a Batch Agitated Vessel”, Proceedings of the 6th World Congress of Chemical Engineering, Melbourne.
  5. Purba, E., Mahmud, T. and Javed, K. H., 2001, “An Experimental Study of Hydrodynamics and Mass Transfer in a Spray Tower”, Proceedings of the Annual Meeting of the American Institute of Chemical Engineers, Reno, Nevada.
  6. Ma, C. Y., Mahmud, T., Fairweather, M., Hampartsoumian, E. and Gaskell, P. H., 2002, “Prediction of Lifted, Non-premixed Turbulent Flames Using a Mixedness-Reactedness Flamelet Model with Radiation Heat Loss”, Combustion and Flame, Vol. 128, pp.60-73.