Navneet Kumar

Navneet Kumar

Post-Doctoral Researcher
Indian Institute of Science


Highest Degree
PostDoc Fellow in Mechanical Engineering from Indian Institute of Science, Bangalore, India

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Biography

Navneet Kumar is a Postdoctoral Fellow in the Department of Mechanical Engineering, Indian Institute of Science (IISc Bangalore). He is currently investigating the role of phase change (through evaporation) in limiting the capillary rise in porous systems. Accordingly, the classical Young-Laplace equation must be modified to account for the evaporation process. This research has implications in understanding the heat load versus cooling performance of wicks in the cooling devices, especially in understanding the phenomenon of ‘dry-out’ in the wicks. Prior to this, during PhD (at IISc Bangalore), he explored, in great detail, the process of evaporation from various surfaces including bare water and porous systems. His contribution is significant towards understanding the physics of evaporation from porous systems such as soils. Some of the systems he used were first-of-a-kind and unexplored; these include closely packed rods / capillaries and stack of vertical plates. His research works are now being referred by others in modelling the porous systems and also to obtain the sites of evaporation using the novel fluorescein dye deposits method. He holds a dual degree (B.Tech and M.Tech, 5 year programme) in Mechanical engineering from IIT (BHU) Varanasi.

Area of Interest:

Engineering
100%
Mechanical Engineering
62%
Agricultural Engineering
90%
Fluid dynamics
75%
Heat Mass transfer
55%

Selected Publications

  1. Mondal, S.S., N. Kumar and P. Ghosh, 2020. Numerical investigation of effects of G-Jitter on buoyant lamin diffusion flame. SAE Int. J. Aerosp., 10.4271/01-13-02-0007.
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  2. Kumar, N., J.H. Arakeri and M.S. Bobji, 2020. Formation of a hard surface layer during drying of a heated porous media. PLoS ONE, 10.1371/journal.pone.0229723.
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  3. Kumar, N. and J.H. Arakeri, 2020. Understanding the coupling between the moisture loss and surface temperature in an evaporating leaf-type surface. Drying Technol., 10.1080/07373937.2020.1817062.
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  4. Kumar, N. and J.H. Arakeri, 2019. Mimicking some features of a root-soil system by dual porosity media. Agric. Water Management, 10.1016/j.agwat.2019.105855.
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  5. Kumar, N. and J.H. Arakeri, 2019. Investigation on the effect of temperature on evaporative characteristic length of a porous medium. Drying Technol., 38: 1194-1206.
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  6. Kumar, N. and J.H. Arakeri, 2019. Heat and mass transfer from a system of closely packed capillaries – Possible choice for wicks. Int. J. Thermal Sci., 10.1016/j.ijthermalsci.2019.106151.
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  7. Kumar, N. and J.H. Arakeri, 2019. Experimental and numerical investigation of evaporation from line sources of water in low porosity surfaces. J. Hydrol., 569: 795-808.
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  8. Kumar, N. and J.H. Arakeri, 2018. Sustained high evaporation rates from porous media consisting of packed circular rods. Int. J. Thermal Sci., 133: 299-306.
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  9. Kumar, N. and J.H. Arakeri, 2018. Experimental investigation of effect of orientation and surface roughness on drying of porous media consisting of rods. Int. J. Multiphase Flow, 109: 114-122.
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  10. Kumar, N. and J.H. Arakeri, 2018. Evaporation from layered porous medium in the presence of infrared heating. Water Resour. Res., 54: 7670-7687.
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  11. Kumar, N. and J.H. Arakeri, 2018. Evaporation from confined porous media due to controlled IR heating from above. Transp. Porous. Med., 125: 311-340.
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  12. Agarwal, P., N. Kumar and J.H. Arakeri, 2018. Burning, fluttering, and extinguishing of a candle flame in a tube. Reson, 23: 1273-1281.
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  13. Kumar, N. and J.H. Arakeri, 2015. Natural convection driven evaporation from a water surface. Procedia IUTAM, 15: 108-115.
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