Dr. Ashish Karn

Assistant Professor -Selection Grade

B.Tech (Mechanical Engineering) from IIT Delhi  

MS (Mechanical Engineering) from University of Minnesota Twin Cities, USA 

Ph.D (Mechanical Engineering) from University of Minnesota Twin Cities, USA  

Area of Specialization

Renewable Energy: Solar and Wind Energy Applications, Silt and Cavitation erosion in hydroturbines; Experimental fluid mechanics; Underwater acoustics; Gas-liquid mass transfer for environmental applications such as wastewater treatment and water desalination; Naval hydrodynamics; Multiphase flows: bubbles and drops; Flow Measurement; Drop Impact; Particle/Shadow Image Velocimetry; Digital image processing; Design Innovation (Refer http://umn.edu/~karn for more details).

International Journals-

A Karn, R E A Arndt, J Hong, An experimental investigation into supercavity closure mechanisms, Journal of Fluid Mechanics 2016, 789, 259-284. (Featured on the cover-page of vol. 789 of Journal of Fluid Mechanics)

A Karn, B Rosiejka, Air entrainment characteristics of artificial supercavities for free and constrained closure models, Experimental Thermal and Fluid Science 2017, 81, 364-369.

S S Kumar, A Karn, R E A Arndt, J Hong, Internal Flow Measurements of drops impacting a solid surface, Experiments in Fluids 2017, 58:12.

L Cao, A Karn, R E A Arndt, Z Wang, J Hong, Numerical investigations into the pressure distribution within a ventilated supercavity, Journal of Fluids Engineering 2017, 139, 021301-01 – 021301-08.

S Shao, A Karn, B K Ahn, R E A Arndt, J Hong, A comparative study of the supercavitation across two closed-wall water tunnel facilities, Experimental Thermal and Fluid Science 2017, 88, 519-529.

A Karn, N Kumar, S Aravindan, Chemical vapor deposition synthesis of novel indium oxide nanostructures in strongly reducing growth ambient, Journal of Nanostructures 2017, 7(1), 64-76.

Karn, Characterization of bubbly flow systems: A review, International Journal of Petrochemical Science and Engineering 2017, 2(6), 00053.

A Karn, R E A Arndt, J Hong, Gas entrainment behaviors in the formation and collapse of a ventilated supercavity, Experimental Thermal and Fluid Science 2016, 79, 294-300.

A Karn, S Shao, R E A Arndt, J Hong, Bubble coalescence and breakup in the turbulent bubbly wake of a ventilated hydrofoil, Experimental Thermal and Fluid Science 2016, 70, 397-407.

S J Lee, E Kawakami, A Karn, R E A Arndt, A comparative study of the behavior of ventilated supercavities between experimental models with different mounting configurations, Fluids Dynamics Research 2016, 48, 045506.

A Karn, G Monson, C Ellis, J Hong, R E A Arndt, J S Gulliver, Mass transfer studies across ventilated hydrofoils: A step towards hydroturbine aeration, International Journal of Heat and Mass Transfer 2015, 87, 512-520.

A Karn, C Ellis, R E A Arndt, J Hong, An integrative image measurement technique for dense bubbly flows with a wide bubble size distribution, Chemical ring Science 2015, 122,240-249.

A Karn, C Ellis, J Hong, R E A Arndt, Investigations into the turbulent bubbly wake of a ventilated hydrofoil: moving towards improved turbine aeration techniques Experimental Thermal and Fluid Science 2015, 64, 186-195.

A Karn, C Ellis, C Milliren, J Hong, D Scott, R E A Arndt, J S Gulliver, Bubble size characteristics in the wake of ventilated hydrofoils with two aeration configurations, International Journal of Fluid Machinery and Systems 2015, 8 (2), 83-93.

A Karn, R E A Arndt, J Hong, Dependence of supercavity closure upon flow unsteadiness, Experimental Thermal and Fluid Science 2015, 68, 493-498.

 Karn, M Kumar, V N Singh, B R Mehta, S Aravindan and J P Singh, Growth of Indium Oxide and Zinc-Doped Indium Oxide Nanostructures, Chemical Vapor Deposition 2012, 18, 295-301.

A Karn, S Chawdhary, On the synergistic interrelation between vaporous and ventilated supercavitation, Experimental Thermal and Fluid Science  (Under revision)

A Karn, J S Gulliver, G Monson, C Ellis, R E A Arndt, J Hong, Gas transfer in a bubbly wake flow IOP Conf. Ser.: Earth Environ. Sci. 2016, 35(1), 012020.

A Karn, V Narula, R E A Arndt, J Hong, Insights into ventilation demand estimation for an underwater vehicle, Lecture Notes in Mechanical Engineering 2016 (In Press).

A Karn, B Rosiejka, V Narula, A Chaturvedi, Some insights into air entrainment characteristics of artificial supercavtities, Proceedings of the 6th International and 43rd National conference on Fluid Mechanics and Fluid Power 2016.

A Karn, S Shao, R E A Arndt,J Hong, Supercavitation physics for next-generation high speed underwater vehicles. Proceedings of 31st ONR symposium on Naval Hydrodynamics, Monterey, California, USA, 2016.

B K Ahn, S W Jeong, J H Kim, S Shao, A Karn, J Hong, R E A Arndt, An experimental study of artificial supercavitation. Proceedings of 31st ONR symposium on Naval Hydrodynamics, Monterey, California, USA, 2016.

A Karn, R De, R E A Arndt, J Hong, Closure mechanisms of ventilated supercavities under steady and unsteady flows IOP Conf. Ser. : J. Phys. 2015, 656, 012145.

C Ellis, A Karn, J Hong, S J Lee, E Kawakami, D Scott, J Gulliver, R Arndt, Measurements in the wake of a ventilated hydrofoil: a step towards improved turbine aeration techniques IOP Conf. Ser. : Earth Environ. Sci. 2014, 22, 062009.

International Conferences-

A Karn, Exploring the relationship between natural and artificial modes of supercavitation, 44th National conference on Fluid Mechanics and Fluid Power, Amritapuri, Kollam, Kerala, India, 2017 (Submitted).

A Karn, B Rosiejka, A Chaturvedi, Some insights into air entrainment characteristics of artificial supercavtities, 6th International and 43rd National conference on Fluid Mechanics and Fluid Power, MNNITA, Allahabad, India, 2016.

A Karn, V Narula, R E A Arndt, J Hong, Insights into ventilation demand estimation for an underwater vehicle, International Conference on Applications of Fluid Dynamics, ISM Dhanbad, Jharkhand, India, 2016.

A Karn, S Shao, R E A Arndt, J Hong, Supercavitation physics for next-generation high speed underwater vehicles. 31st ONR symposium on Naval Hydrodynamics, Monterey, California, USA, 2016.

B K Ahn, S W Jeong, J H Kim, S Shao, A Karn, J Hong, R E A Arndt, An experimental study of artificial supercavitation. 31st ONR symposium on Naval Hydrodynamics, Monterey, California, USA, 2016.

A Karn, G Monson, C Ellis, J Hong, Roger E A Arndt, J S Gulliver, Oxygen transfer across ventilated hydrofoils. 7th International Symposium on Gas Transfer at Water Surfaces, Seattle, USA, 2015.

A Karn, R E A Arndt, J Hong, Closure mechanisms of ventilated supercavities under steady and unsteady flow conditions, 9th International Symposium on Cavitation, Switzerland, 2015.

A Karn, R E A Arndt, J Hong, On the relationship between supercavity closures, air entrainment and internal flows, 68thAnnual Meeting of American Physical Society-Division of Fluid Dynamics, Boston, USA, 2015.

A Karn, R E A Arndt, J Hong, A robust image analysis approach for high void fraction gas-liquid flows, 3rd World Congress on Petrochemistry and Chemical Engineering, Atlanta, USA, 2015.

R De, A Karn, J Noonan, B Rosiejka, R E A Arndt, J Hong, Characterization of drop impact based on internal flow quantification, 68thAnnual Meeting of American Physical Society-Division of Fluid Dynamics, Boston, USA, 2015.

 D Scott, M Sabourin, S Beaulieu, C Ellis, A Karn, Optimizing dissolved oxygen transfer in auto-venting turbines Hydrovision International, Portland, USA, 2015.

A Karn, C Ellis, R E A Arndt, J Hong, Bubble size measurements in a bubbly wake, 67thAnnual Meeting of American Physical Society-Division of Fluid Dynamics, San Francisco, USA, 2014.

R E A Arndt, A Karn, J Hong, A unified physical model to explain supercavity closure, 67thAnnual Meeting of American Physical Society-Division of Fluid Dynamics, San Francisco, USA, 2014.

C Ellis, A Karn, J Hong, S J Lee, E Kawakami, D Scott, J S Gulliver, R E A Arndt,  Measurements in the wake of a ventilated hydrofoil: A step towards improved turbine aeration techniques, 27th IAHR Symposium Hydraulic Machinery and Systems, Montreal, Canada, 2014.

S J Lee, E Kawakami, A Karn, R E A Arndt, Experimental investigation on the behaviors of ventilated supercavities, Proceedings of the annual autumn meeting of the Society of Naval architects of Korea, Changwon, Korea, 2014.

E Kawakami, S J Lee, A Karn, J Hong, R E A Arndt, Improved performance with ventilation 66th Annual Meeting of American Physical Society-Division of Fluid Dynamics, Pittsburgh, USA, 2013.

R E A Arndt, S J Lee, E Kawakami, J Hong, A Karn, Ventilation of a hydrofoil wake, 66th Annual Meeting of American Physical Society-Division of Fluid Dynamics, Pittsburgh, USA, 2013.

A Karn, S Aravindan, V N Singh, Metallographic analysis of the polyhedral indium zinc oxide mesocontainers, International Metallographic contest, Nashville, USA, 2011.

A Karn, S Aravindan, V N Singh, B R Mehta, Synthesis, shape evolution and growth mechanism of polyhedral indium zinc oxide mesocontainers, International Metallographic contest, Nashville, USA, 2011.