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Acceleration parameters for fluid physics with accelerating bodies

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dc.contributor.author Gledhill, Irvy MA
dc.contributor.author Roohani, H
dc.contributor.author Biobaku, A
dc.contributor.author Skews, B
dc.date.accessioned 2017-02-23T10:00:14Z
dc.date.available 2017-02-23T10:00:14Z
dc.date.issued 2016-06
dc.identifier.citation Gledhill, I.M.A., Roohani, H., Biobaku, A. and Skews, B. 2016. Acceleration parameters for fluid physics with accelerating bodies. In: The Proceedings of The 60th Annual Conference of The South African Institute of Physics (SAIP2015), 29 June - 3 July 2015, Port Elizabeth, Boardwalk Convention Centre en_US
dc.identifier.isbn 78-0-620-70714-5
dc.identifier.uri http://events.saip.org.za/getFile.py/access?resId=73&materialId=6&confId=53
dc.identifier.uri http://hdl.handle.net/10204/8952
dc.description The Proceedings of The 60th Annual Conference of The South African Institute of Physics (SAIP2015), 29 June - 3 July 2015, Port Elizabeth, Boardwalk Convention Centre en_US
dc.description.abstract Theoretical work on transforming the Navier-Stokes equations into arbitrarily accelerating frames has included the continuity, momentum, and energy conservation equations. An analysis of the momentum equation in non-dimensional terms leads to an acceleration parameter that appears to be new in fluid physics, but is known in cosmology. A selection of cases for rectilinear acceleration has been chosen to illustrate the point that this parameter alone does not govern regimes of flow about significantly accelerating bodies, and reference must be made, above all, to the Mach number for transonic effects. Other parameters from the literature on impulsive start-up in wind tunnels are also shown to be useful in delimiting regimes of flow, such as the Freymuth start-up time. Two dominant effects in fluid dynamics with accelerating objects are shown to be flow history, a term being used to cover the difference between an instantaneous flow field with an accelerating body and the flow field about the same body at steady state, and the dependence of stagnation pressure on acceleration. The dependence of these effects on dimensionless parameters is explored. en_US
dc.language.iso en en_US
dc.publisher SA Institute of Physics en_US
dc.relation.ispartofseries Wokflow;17573
dc.subject Navier-Stokes equations en_US
dc.subject Fluid physics en_US
dc.subject Aeronautical engineering en_US
dc.title Acceleration parameters for fluid physics with accelerating bodies en_US
dc.type Conference Presentation en_US
dc.identifier.apacitation Gledhill, I. M., Roohani, H., Biobaku, A., & Skews, B. (2016). Acceleration parameters for fluid physics with accelerating bodies. SA Institute of Physics. http://hdl.handle.net/10204/8952 en_ZA
dc.identifier.chicagocitation Gledhill, Irvy MA, H Roohani, A Biobaku, and B Skews. "Acceleration parameters for fluid physics with accelerating bodies." (2016): http://hdl.handle.net/10204/8952 en_ZA
dc.identifier.vancouvercitation Gledhill IM, Roohani H, Biobaku A, Skews B, Acceleration parameters for fluid physics with accelerating bodies; SA Institute of Physics; 2016. http://hdl.handle.net/10204/8952 . en_ZA
dc.identifier.ris TY - Conference Presentation AU - Gledhill, Irvy MA AU - Roohani, H AU - Biobaku, A AU - Skews, B AB - Theoretical work on transforming the Navier-Stokes equations into arbitrarily accelerating frames has included the continuity, momentum, and energy conservation equations. An analysis of the momentum equation in non-dimensional terms leads to an acceleration parameter that appears to be new in fluid physics, but is known in cosmology. A selection of cases for rectilinear acceleration has been chosen to illustrate the point that this parameter alone does not govern regimes of flow about significantly accelerating bodies, and reference must be made, above all, to the Mach number for transonic effects. Other parameters from the literature on impulsive start-up in wind tunnels are also shown to be useful in delimiting regimes of flow, such as the Freymuth start-up time. Two dominant effects in fluid dynamics with accelerating objects are shown to be flow history, a term being used to cover the difference between an instantaneous flow field with an accelerating body and the flow field about the same body at steady state, and the dependence of stagnation pressure on acceleration. The dependence of these effects on dimensionless parameters is explored. DA - 2016-06 DB - ResearchSpace DP - CSIR KW - Navier-Stokes equations KW - Fluid physics KW - Aeronautical engineering LK - https://researchspace.csir.co.za PY - 2016 SM - 78-0-620-70714-5 T1 - Acceleration parameters for fluid physics with accelerating bodies TI - Acceleration parameters for fluid physics with accelerating bodies UR - http://hdl.handle.net/10204/8952 ER - en_ZA


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