Abstract
AbstractEquipment performance improvement in a wide range of working conditions is one of the major goals of aerodynamics. This goal can be achieved by the deformation of the object being examined or by using flow control techniques in active or inactive modes. In different researches, how to change the development ratio on the semi-confined space with input jet system is surveyed. In this study, two-dimensional simulation of the flow has been investigated in three-jet laminar flow in a semi-confined space. To determine the effective and optimal mixing in a laminar flow, critical Reynolds numbers were determined to distinguish when the flow in the channel from a steady-state symmetric flowformed downstream recirculation and ultimately transient flow. To better understand the flow characteristics, the simulations were changed at a fixed jet spacing (input jets distance to height of space ratio). Also, in this paper, for comparison, four jets were considered. Based on the results, it was observed that in all cases, mixing occurred in the space between three jets. Placing the jet along the walls of the semi-confined space allows the best combination, and increase in the distance between the first and third jets and reduction of the particle coefficient caused to reach the critical Reynolds number faster and, as a result, mixing in a laminar flow with geometric changes of the semi-confined space.
Highlights
The mixing process takes place to achieve the same physical properties in the uid
Jones et al tested the ows to the water surface and nally presented a table for ow classi cation and prediction of trajectory and di usion; it showed mixing of a two dimensional jet with low Reynolds numbers at a distance speci cally, it ends and goes downwards [6]
Jirka analyzes the input jet in shallow waters and states that all of the characteristics related to the concentration and di usion of jets [7], in the shallow environments, are inuenced by the depth of ow which was studied by Cateberson et al based on sewage from wastewater [8]
Summary
The mixing process takes place to achieve the same physical properties in the uid. Di erent uids are mixed by mechanical means, such as using mixer (propeller), uid jets, Jones et al tested the ows to the water surface and nally presented a table for ow classi cation and prediction of trajectory and di usion; it showed mixing of a two dimensional jet with low Reynolds numbers at a distance speci cally, it ends and goes downwards [6]. Placing the jet along the walls of the semicon ned space allows the best combination, and increase in the distance between the rst and third jets and reduction of the particle coe cient caused to reach the critical Reynolds number faster and, as a result, mixing in a laminar ow with geometric changes of the semi-con ned space.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
