@article{20928,
  abstract     = {The current work focuses on the performance of hydrodynamics and mass transfer in a microchannel. A hydrodynamic model is developed for a gas–liquid (CO2–water) system and slug flow pattern. For the first time in literature, a concept of pulsating velocity input is introduced in an enhanced cross-T-junction microchannel to study the mass transfer using the physical absorption mechanism in ANSYS FLUENT R2 2024. The mass transfer model is associated with the hydrodynamic model and some user-defined functions in FLUENT. This work demonstrates that incorporating obstructions and applying trapezoidal and sinusoidal wave inputs improve the CO2 absorption rate. The obtained data are further compared with the plain T-junction microchannel in terms of mass transfer coefficient. Solubility of CO2 in three different solvents (ethyl alcohol, water, and ethylene glycol) has been revealed in an enhanced cross T-junction microchannel at two different temperatures, i.e., 298.15 and 303.15 K. The numerical simulations illustrate that an increase in temperature has an adverse effect on the mass transfer rate.},
  author       = {Khatoon, Bushra and Chaudhary, Vikas K. and Kamil, Shoaib and Hasan, Shabih Ul and Alam, M. Siraj},
  issn         = {1089-7666},
  journal      = {Physics of Fluids},
  number       = {12},
  publisher    = {AIP Publishing},
  title        = {{Enhanced mass transfer in microgeometry using pulsating velocity inputs: Hydrodynamic analysis and numerical simulation}},
  doi          = {10.1063/5.0303132},
  volume       = {37},
  year         = {2025},
}

@article{12172,
  abstract     = {In industrial reactors and equipment, non-ideality is quite a common phenomenon rather than an exception. These deviations from ideality impact the process's overall efficiency and the effectiveness of the equipment. To recognize the associated non-ideality, one needs to have enough understanding of the formulation of the equations and in-depth knowledge of the residence time distribution (RTD) data of real reactors. In the current work, step input and pulse input were used to create RTD data for Cascade continuous stirred tank reactors (CSTRs). For the aforementioned configuration, experiments were run at various flow rates to validate the developed characteristic equations. To produce RTD data, distilled water was utilized as the flowing fluid, and NaOH was the tracer substance. The ideal behavior of tracer concentration exits age distribution, and cumulative fraction for each setup and each input was plotted and experimental results were compared with perfect behavior. Deviation of concentration exit age distribution and cumulative fractional distribution from ideal behavior is more in pulse input as compared to a step input. For ideal cases, the exit age distribution curve and cumulative fraction curves are independent of the type of input. But a significant difference was observed for the two cases, which may be due to non-measurable fluctuations in volumetric flow rate, non-achievement of instant injection of tracer in case of pulse input, and slight variations in the sampling period. Further, with increasing flow rate, concentration, exit age, and cumulative fractional curves shifted upward, and this behavior matches with the actual case.},
  author       = {Khatoon, Bushra and Kamil, Shoaib and Babu, Hitesh and Siraj Alam, M.},
  issn         = {2214-7853},
  journal      = {Materials Today: Proceedings},
  keywords     = {General Medicine},
  number       = {Part 1},
  pages        = {40--47},
  publisher    = {Elsevier},
  title        = {{Experimental analysis of Cascade CSTRs with step and pulse inputs}},
  doi          = {10.1016/j.matpr.2022.11.037},
  volume       = {78},
  year         = {2023},
}