Simulation experience

Dr. V. S. Patwardhan has more than thirty years of experience in mathematical modeling and simulation which can be broadly classified into :

  Simulation / Software Development for Industry
  Simulation in Process Development
  Simulation in Chemical Engineering Research


Simulation / Software Development for Industry

Mathematical modeling and development of simulation software were undertaken for industry in the following areas. In many cases, the software packages had user-friendly graphical interfaces since they were to be installed on client's computers. Demonstration versions of some of these are available for free download.
  1. naphtha reformer loop
  2. diammonium phosphate granulation loop
  3. a train of distillation columns
  4. vapour absorption refrigeration systems
  5. fluidised bed Polyethylene reactor
  6. PET (Polyethylene terephthalate) finisher
  7. PET reactors
  8. melt spinning of PET
  9. drawing of PET
  10. hydrogenation in a slurry reactor
  11. sintering of PTFE (Polytetrafluoroethylene) billets
  12. lactam extraction from nylon chips
  13. manufacture of Guanidine Nitrate
  14. solid-liquid equilibrium flash calculations for aqueous electrolyte systems
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Simulation in Process Development

Simulation in different forms was used in the following process development projects :
  1. Hexachlorocyclopentadiene  - This project involved bench scale work as well as designing and setting up of a pilot plant which included three different types of chemical reactors. Throughout the process development work, mathematical modeling was used extensively for data analysis, which resulted in a very efficient use of the experimental effort put into the project.
  2. Benzaldehyde  -  This project involved laboratory scale catalyst development in microreactors without gas recycle, and designing and setting up a single tube pilot plant involving gas recycle. The use of mathematical modeling in the design of the pilot plant enabled the project team to achieve the expected results from the pilot plant just after a few runs.
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Simulation in Chemical Engineering Research

Mathematical modeling and simulation techniques were used extensively in my basic research in chemical engineering, in areas such as multiphase reactions, thermodynamics, solid-fluid operations and polymer processing. The titles of some relevant publications are listed below. More information is available in the list of publications.
  1. Diffusion and Sorption in Zeolites- I : A Markov Process Formulation
  2. A Method for Obtaining Diffusivity and Rate Constant in Solid-solid Reactions
  3. Effective Interfacial Area in Packed Beds for Absorption with Chemical Reaction
  4. Liquid Distribution in Packed Trickle Beds
  5. Sedimentation and Liquid Fluidisation of Solid Particles of Different Sizes and Densities
  6. Effect of Particle Stratification on the Performance of Fluidised Adsorprion Beds
  7. A Unified Approach for the Prediction of Thermodynamic Properties of Aqueous Mixed Electrolyte Solutions
  8. Aqueous Solutions of Single Electrolytes : A Correlation Based on Ionic Hydration
  9. Activity Coefficients in Mixed Electrolyte Solutions
  10. Vapour Pressure of Aqueous Mixed Electrolyte Solutions without a Common Ion
  11. Heat Pump Assisted Drying : A Mathematical Model
  12. Sensitivity Analysis of Heat Exchanger Networks
  13. Design and Simulation of Single and Multipass Heat Exchangers
  14. An Improved Model for Transport through Thin Film Composite Membranes
  15. Simulation Software for Multifilament Melt Spinning of PET
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