### 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.
- naphtha reformer loop
- diammonium phosphate granulation loop
- a train of distillation columns
- vapour absorption refrigeration systems
- fluidised bed Polyethylene reactor
- PET (Polyethylene terephthalate) finisher
- PET reactors
- melt spinning of PET
- drawing of PET
- hydrogenation in a slurry reactor
- sintering of PTFE (Polytetrafluoroethylene) billets
- lactam extraction from nylon chips
- manufacture of Guanidine Nitrate
- 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 :
- 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.
- 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.
- Diffusion and Sorption in Zeolites- I : A Markov Process
Formulation
- A Method for Obtaining Diffusivity and Rate Constant in
Solid-solid
Reactions
- Effective Interfacial Area in Packed Beds for Absorption with
Chemical
Reaction
- Liquid Distribution in Packed Trickle Beds
- Sedimentation and Liquid Fluidisation of Solid Particles of
Different
Sizes
and Densities
- Effect of Particle Stratification on the Performance of Fluidised
Adsorprion
Beds
- A Unified Approach for the Prediction of Thermodynamic Properties
of
Aqueous
Mixed Electrolyte Solutions
- Aqueous Solutions of Single Electrolytes : A Correlation Based on
Ionic
Hydration
- Activity Coefficients in Mixed Electrolyte Solutions
- Vapour Pressure of Aqueous Mixed Electrolyte Solutions without a
Common
Ion
- Heat Pump Assisted Drying : A Mathematical Model
- Sensitivity Analysis of Heat Exchanger Networks
- Design and Simulation of Single and Multipass Heat Exchangers
- An Improved Model for Transport through Thin Film Composite
Membranes
- Simulation Software for Multifilament Melt Spinning of PET

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