Amirreza Zarnaghsh - Academia.edu (original) (raw)
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Papers by Amirreza Zarnaghsh
Journal of Industrial and Engineering Chemistry, 2018
This paper reviews the state-of-the-art numerical techniques employed in the literature for model... more This paper reviews the state-of-the-art numerical techniques employed in the literature for modelling slug flow in microchannels. The proposed solutions in literature for overcoming some of the drawbacks of the numerical methods are presented. Additionally, literature covering specific applications such as enhancement of heat transfer and mixing is reviewed to provide further insight into the transport mechanisms and their applications. Digital microfluidics, as a means of slug manipulation and control, is introduced in the following section of the paper. The application of thermocapillary, magnetic, electric, optical and acoustic forces is elaborated in particular.
Science of The Total Environment
Various industrial applications use jet impingement against surface to provide an effective mode ... more Various industrial applications use jet impingement against surface to provide an effective mode of heat transfer. Its application includes, but not limited to, heat treatment, thermal management of optical surfaces for defogging, cooling of critical machinery structures, and rocket launcher cooling. In this study, numerical analysis of various heat transfer configurations of jet impingement on a semi-circular surface is carried out. These configurations were compared on the basis of effective heat transfer by achieving higher Nusselt number and lower surface temperature as convection heat is becoming the dominant phenomenon. The numerical model was developed for considering the application of a uniform heat flux on a curved surface subjected to jet flow that simulating an internal channel under cooling. The results found to be in agreement with the literature experimental data. To gain more insight on the underlining physics of the flow, a sensitivity analysis on the jet impingement configuration and flow conditions were conducted and was demonstrated to the inner cooling of the 1 st stage gas turbine blade.
Journal of Industrial and Engineering Chemistry, 2018
This paper reviews the state-of-the-art numerical techniques employed in the literature for model... more This paper reviews the state-of-the-art numerical techniques employed in the literature for modelling slug flow in microchannels. The proposed solutions in literature for overcoming some of the drawbacks of the numerical methods are presented. Additionally, literature covering specific applications such as enhancement of heat transfer and mixing is reviewed to provide further insight into the transport mechanisms and their applications. Digital microfluidics, as a means of slug manipulation and control, is introduced in the following section of the paper. The application of thermocapillary, magnetic, electric, optical and acoustic forces is elaborated in particular.
Science of The Total Environment
Various industrial applications use jet impingement against surface to provide an effective mode ... more Various industrial applications use jet impingement against surface to provide an effective mode of heat transfer. Its application includes, but not limited to, heat treatment, thermal management of optical surfaces for defogging, cooling of critical machinery structures, and rocket launcher cooling. In this study, numerical analysis of various heat transfer configurations of jet impingement on a semi-circular surface is carried out. These configurations were compared on the basis of effective heat transfer by achieving higher Nusselt number and lower surface temperature as convection heat is becoming the dominant phenomenon. The numerical model was developed for considering the application of a uniform heat flux on a curved surface subjected to jet flow that simulating an internal channel under cooling. The results found to be in agreement with the literature experimental data. To gain more insight on the underlining physics of the flow, a sensitivity analysis on the jet impingement configuration and flow conditions were conducted and was demonstrated to the inner cooling of the 1 st stage gas turbine blade.