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Extending a hybrid continuum-molecular simulation method to solve the micro/nanoscale gas mixing problems
, Article ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2018, 15 July 2018 through 20 July 2018 ; Volume 3 , 2018 ; 08888116 (ISSN); 9780791851579 (ISBN) ; Darbandi, M ; Schneider, G. E ; Fluids Engineering Division ; Sharif University of Technology
American Society of Mechanical Engineers (ASME)
2018
Abstract
Despite vast efforts in developing hybrid continuum-molecular methods, there has been no specific work focused on the gas mixture flow simulations including the mixing and/or separation of species. In present study, we extend a hybrid method to analyze such phenomena suitably and study the gas mixing problems in micro/nano length scales reliably. The results of current hybrid simulations are compared against the results of full-molecular simulations to evaluate the physical accuracy of developed hybrid method. The effect of continuum breakdown criterion is investigated to find out the achieved accuracy of developed hybrid simulation method from different perspectives. The current results...
Numerical study of bacterial influences caused by patient breathing
, Article 6th International Conference on Fluid Flow, Heat and Mass Transfer, FFHMT 2019, 18 June 2019 through 19 June 2019 ; 2019 ; 23693029 (ISSN); 9781927877593 (ISBN) ; Saidi, M. H ; Darbandi, M ; Schneider, G. E ; Sharif University of Technology
Avestia Publishing
2019
Abstract
This research aims two major objectives: first, the influence of respiration on the particles concentration is investigated numerically in a cleanroom with a specified geometry and second, the respiration and the manner of particles diffusion are simulated. Generally, in many hospital cleanrooms such as the open-heart surgery, organ transplantation and neurosurgery rooms, reduction of the pollutant particles is important as a factor that can lead to capillary clogging during operation. In addition, the significance of reducing the concentration of large particles reveals more according to the fact that dust particles may act as a means for various pathogenic bacteria and viruses. Every...
Numerical study of bacterial influences caused by patient breathing
, Article 6th International Conference on Fluid Flow, Heat and Mass Transfer, FFHMT 2019, 18 June 2019 through 19 June 2019 ; 2019 ; 23693029 (ISSN); 9781927877593 (ISBN) ; Saidi, M. H ; Darbandi, M ; Schneider, G. E ; Sharif University of Technology
Avestia Publishing
2019
Abstract
This research aims two major objectives: first, the influence of respiration on the particles concentration is investigated numerically in a cleanroom with a specified geometry and second, the respiration and the manner of particles diffusion are simulated. Generally, in many hospital cleanrooms such as the open-heart surgery, organ transplantation and neurosurgery rooms, reduction of the pollutant particles is important as a factor that can lead to capillary clogging during operation. In addition, the significance of reducing the concentration of large particles reveals more according to the fact that dust particles may act as a means for various pathogenic bacteria and viruses. Every...
Modelling of natural convection flows with large temperature differences: A benchmark problem for low mach number solvers. Part 2. Contributions to the June 2004 conference
, Article Mathematical Modelling and Numerical Analysis ; Volume 39, Issue 3 , 2005 , Pages 617-621 ; 0764583X (ISSN) ; Le Quéré, P ; Weisman, C ; Vierendeels, J ; Dick, E ; Braack, M ; Dabbene, F ; Beccantini, A ; Studer, E ; Kloczko, T ; Corre, C ; Heuveline, V ; Darbandi, M ; Hosseinizadeh, S. F ; Sharif University of Technology
EDP Sciences
2005
Abstract
In the second part of the paper, we compare the solutions produced in the framework of the conference "Mathematical and numerical aspects of low Mach number flows" organized by INRIA and MAB in Porquerolles, June 2004, to the reference solutions described in Part 1. We make some recommendations on how to produce good quality solutions, and list a number of pitfalls to be avoided. © EDP Sciences, SMAI 2005