Search Results - "Tafreshi, H. V."

Importance of Dipole Orientation in Electrostatic Aerosol Filtration by Kumar, A., Gautam, S., Atri, S., Tafreshi, H. V., Pourdeyhimi, B.

“…Electrostatic charge is a major part of modern-day aerosol filtration media (e.g., N95 respirators and surgical facemasks) that has remained poorly understood…”
Get full text

Macroscale modeling of electrostatically charged facemasks by Jamali, M., Atri, S., Gautam, S., Saleh, A. M., Tafreshi, H. V., Pourdeyhimi, B.

“…In this study, the instantaneous collection efficiency and pressure drop of an N95 facemask is numerically simulated in a setting similar (but not identical)…”
Get full text

Controlling detachment residue via magnetic repulsion force by Jamali, M., Mehta, K. S., Holweger, H., Amrei, M. M., Tafreshi, H. V.

“…This work demonstrates the possibility of using a magnetic repulsion force to reduce the volume of the residue that remains on a surface after detachment of a…”
Get full text

Designing Multi-Layer electret filters via numerical simulation by Gautam, S., Kumar, A., Tafreshi, H.V., Pourdeyhimi, B.

Get full text

A simple approach to simulate corona-charged electret filters by Gautam, S., Kumar, A., Tafreshi, H.V., Pourdeyhimi, B.

Get full text

Microscale modelling of electret filters using disordered 2-D domains by Atri, S., Kumar, A., Gautam, S., Tafreshi, H.V., Pourdeyhimi, B.

Get full text

The impact of particle deposition on collection efficiency of electret fibers by Kumar, A., Gautam, S., Atri, S., Tafreshi, H.V., Pourdeyhimi, B.

“…This study presents a microscale simulation method that allows one to study the impact of particle loading on the aerosol capture efficiency of an…”
Get full text

Macroscale simulation of particle loading in electrostatically charged filters by Gautam, S., Saleh, A.M., Tafreshi, H.V., Radney, J.G., Pourdeyhimi, B.

“…Existing studies have shown that particle collection efficiency of a charged filter tends to decrease with particle loading to a certain extent, then increase…”
Get full text

A Simple Nozzle Configuration for the Production of Low Divergence Supersonic Cluster Beam by Aerodynamic Focusing by Tafreshi, H. Vahedi, Benedek, G., Piseri, P., Vinati, S., Barborini, E., Milani, P.

“…A nozzle configuration for the production of an intense and collimated supersonic cluster beam is presented and characterized by numerical modeling. A simple…”
Get full text

Measurement of inflection angle and correlation of shape factor of barrel-shaped droplets on horizontal fibers by Davoudi, M., Amrei, M.M., Tafreshi, H.V., Chase, G.G.

“…[Display omitted] •Shape factor and inflection angle of nanoliter droplets on fibers were measured.•Inflection angles and drop volumes determined by polynomial…”
Get full text

Manipulation of nanoparticles in supersonic beams for the production of nanostructured materials by Piseri, P., Tafreshi, H. Vahedi, Milani, P.

“…Production and manipulation of nanoparticles in the gas phase is of primary importance for the synthesis of nanostructured materials and for the development of…”
Get full text

The effects of nozzle geometry on waterjet breakup at high Reynolds numbers by VAHEDI TAFRESHI, H, POURDEYHIMI, B

“…Waterjet breakup is traditionally considered to follow the Ohnesorge classification. In this classification, high Reynolds number waterjets are considered to…”
Get full text

The role of gas dynamics in operation conditions of a Pulsed Microplasma Cluster Source for nanostructured thin films deposition by Tafreshi, H Vahedi, Piseri, P, Benedek, G, Milani, P

“…This study intends to explain the fluid dynamic characteristics of a Pulsed Microplasma Cluster Source (PMCS). An axially symmetric steady state simulation is…”
Get more information

Simulating Cavitation and Hydraulic Flip Inside Hydroentangling Nozzles by Vahedi Tafreshi, H., Pourdeyhimi, B.

“…Hydroentangling owes its success to the peculiar properties of coherent water jets. For hydroentangling to be feasible at higher pressures, it is extremely…”
Get full text

Effect of Nozzle Geometry on Hydroentangling Water Jets: Experimental Observations by Begenir, A., Tafreshi, H. Vahedi, Pourdeyhimi, B.

“…This paper reports on the role of nozzle geometry on the characteristics of hydroen tangling water jets, specifically the behavior of three different…”
Get full text

Simulating the Flow Dynamics in Hydroentangling Nozzles: Effect of Cone Angle and Nozzle Aspect Ratio by Tafreshi, H. Vahedi, Pourdeyhimi, B.

“…Flow behavior in various nozzle shapes from the hydroentangling cone-capillary family is modeled in this paper. The work studies the effects of cone angle and…”
Get full text

Simulating and Characterizing Water Flows Inside Hydroentangling Orifices by Tafreshi, H. Vahedi, Pourdeyhimi, B., Holmes, R., Shiffler, D.

“…The hydroentangling technique uses cone-capillary orifice nozzles to direct high-energy water jets against loose fiber webs. This study simulates the effects…”
Get full text

Role of Baffles on Flow Fields Inside Wet-Lay Mixing Tanks and Their Potential Influence on Fiber Dispersion by Vahedi Tafreshi, H., Pourdeyhimi, B.

“…Dispersion and separation of fiber bundles requires exposing them to a shear stress field to overcome interfiber frictional forces. To this end, fiber-mixing…”
Get full text

Simulation on the Effect of Brownian Motion on Nanoparticle Trajectories in a Pulsed Microplasma Cluster Source by Vahedi Tafreshi, H, Piseri, P, Barborini, E, Benedek, G, Milani, P

“…We describe a simulation of the nanoparticle trajectories in a pulsed cluster beam source. Clusters, formed by condensation of atomic vapor in a helium bath,…”
Get full text

SIP-based internetwork system between Future IP Networks and ZigBee based Wireless Personal Area Networks (WPAN) by Alshamrani, M., Cruickshank, H., Zhili Sun, Elmasri, B., Tafreshi, V. H.

“…The internetwork system between Future IP Networks and ZigBee Wireless Networks has two main approaches; the SIP Proxy Based approach, and the ZigBee Stack…”
Get full text