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jet-velocity
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Investigation of mass transfer coefficient under jetting conditions in a liquid-liquid extraction system
, Article Iranian Journal of Chemistry and Chemical Engineering ; Volume 29, Issue 1 , 2010 , Pages 1-12 ; 10219986 (ISSN) ; Omidkhah, M. R ; Bastani, D ; Saifkordi, A. A ; Sharif University of Technology
Abstract
In this research mass transfer coefficient under jetting regime in different directions (from dispersed to continuous and continuous to dispersed phase) has been studied using an experimental setup. n-Butanol-succinic acid-water with low interfacial tension has been selected as experimental chemical system. The effects of various parameters such as jet velocity, nozzle diameter and the height of the continuous phase above the nozzle, on mass transfer coefficient have been investigated. A correlation has also been derived in order to predict the mass transfer coefficient as a function of physical properties of both phases and aforementioned parameters. Based on the experimental results, mass...
The effects of different jet velocities and axial misalignment on the liquid sheet of two colliding jets
, Article Chemical Engineering Science ; Volume 206 , 2019 , Pages 235-248 ; 00092509 (ISSN) ; Kebriaee, A ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
This experimental study investigated the patterns and characteristics of the liquid sheet formed by two axial misaligned colliding jets and two colliding jets with different velocities. The tests were limited to the low Reynolds number region, 100
Fishbone pattern formation due to asymmetries in colliding low-velocity jets
, Article Atomization and Sprays ; Volume 28, Issue 8 , 2018 , Pages 751-762 ; 10445110 (ISSN) ; Kashanj, S ; Olyaei, G ; Sharif University of Technology
Begell House Inc
2018
Abstract
Here, we experimentally investigated the effects of skewness and velocity difference of two Newtonian colliding jets on the formation of a special oscillating liquid sheet pattern with periodic fragmentation, called fishbone, for four liquid sheet regimes known as the triple chain, double chain, close rim, and open rim. We expressed the ranges of the skewness and the velocity difference, where the fishbone pattern was formed for every four regimes. The formation of this special pattern was attributed to the instability of the liquid rim in the past studies. We qualitatively studied the upward and downward directions of the rims branched from the liquid sheet. Besides, the size variations of...
Large Eddy Simulation of multiple jets into a cross flow
, Article Scientia Iranica ; Volume 14, Issue 3 , 2007 , Pages 240-250 ; 10263098 (ISSN) ; Taeibi Rahni, M ; Saidi, M. H ; Sharif University of Technology
Sharif University of Technology
2007
Abstract
Multiple square cross section jets into a cross flow at three different velocity ratios, namely 0.5, 1.0 and 1.5, have been computationally simulated, using the Large Eddy Simulation (LES) approach. The finite volume method is applied in the computational methodologies, using an unsteady SIMPLE algorithm and employing a non-uniform staggered grid. All spatial and temporal terms in the Navier-Stokes equations have been discretized using the Power-Law and Crank-Nicolson schemes, respectively. Mean velocity profiles at different X-locations are compared with the existing experimental and Reynolds Averaged Navier-Stokes (RANS) computational results. Although the RANS computations require much...
Compound triple jets film cooling improvements via velocity and density ratios: Large eddy simulation
, Article Journal of Fluids Engineering, Transactions of the ASME ; Volume 133, Issue 3 , Mar , 2011 ; 00982202 (ISSN) ; Ramezanizadeh, M ; Taeibi Rahni, M ; Salimi, M ; Sharif University of Technology
2011
Abstract
The flow hydrodynamic effects and film cooling effectiveness placing two small coolant ports just upstream the main jet (combined triple jets) were numerically investigated. Cross sections of all jets are rectangular and they are inclined normally into the hot cross-flow. The finite volume method and the SIMPLE algorithm on a multiblock nonuniform staggered grid were applied. The large-eddy simulation approach with three different subgrid scale models was used. The obtained results showed that this flow configuration reduces the mixing between the freestream and the coolant jets and hence provides considerable improvements in film cooling effectiveness (both centerline and spanwise averaged...