R
R. Arun Kumar
Researcher at Indian Institute of Technology Madras
Publications - 9
Citations - 77
R. Arun Kumar is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Jet (fluid) & Oblique shock. The author has an hindex of 4, co-authored 9 publications receiving 38 citations. Previous affiliations of R. Arun Kumar include Indian Institute of Science & Andong National University.
Papers
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Physics of vacuum generation in zero-secondary flow ejectors
R. Arun Kumar,G. Rajesh +1 more
TL;DR: In this article, the authors investigate the secondary flow characteristics and the associated vacuum generation caused with an increase in the primary pressure ramping in zero-secondary flow ejectors, and they find that with the jet expansion reaching a critical level, the fluid supply from the reverse flow is suddenly entrained back into the main jet at the maximum jet expansion point.
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Design of porous calcium phosphate based gel polymer electrolyte for Quasi-solid state sodium ion battery
Ajay Piriya Vijaya Kumar Saroja,R. Arun Kumar,Bhaskar Chandra Moharana,M. Kamaraj,Sundara Ramaprabhu +4 more
TL;DR: In this article, a gel polymer using hydroxyapatite, a calcium phosphate-based compound in poly (vinylidene fluoride-hexafluoropropylene)-poly (butyl methacrylate) blend membrane was developed by a simple solution casting technique.
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Shock transformation and hysteresis in underexpanded confined jets
R. Arun Kumar,G. Rajesh +1 more
TL;DR: In this paper, the authors investigated the shock transformation in an underexpanded jet in a confined duct when the jet total pressure is increased, and they found that the Mach reflection in the fully undereexpanded jet transforms to a regular reflection (RR) at a certain pressure.
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Flow transients in un-started and started modes of vacuum ejector operation
R. Arun Kumar,G. Rajesh +1 more
TL;DR: In this paper, an experimental study has been carried out to investigate the nature of transients in vacuum ejector flows during start-up and the dynamics in flow characteristics, and the results show that the secondary stream induction progresses with non-uniform rates with the ramping primary jet pressure during startup.
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Computational analysis of the wave motions in micro-shock tube flow
TL;DR: In this paper, the wave propagation characteristics in a micro-shock tube under rarefied conditions using computational fluid dynamics methods were analyzed and the main objective of the present paper was to produce a detailed understanding on the wave propagations characteristics in the micro shock tube under different operating conditions.