Sumit Kumar

Primary contact : sumit.kumar2015@iitkgp.ac.in

Secondary Contact : sumitkumar.besu2010@gmail.com

Area of Interest : Interfacial phenomena, Electrowetting, Soft Wetting

Summary : My current research focuses on the spreading dynamics of sessile liquid droplet under the imposed electric field. This dynamics of the droplet spreading is governed by the different forces such as capillary force, surface force, and electrostatic force. My research work further includes the soft wetting phenomena. In soft wetting, I am exploring the physics involved behind the elasto-capillary interaction of a sessile droplet placed on a flexible surface under the influence of applied electrical potential.

List of Publication:

1. Sumit Kumar, Sunando DasGupta, and Suman Chakraborty, “Nanoparticles Modulated Electrowetting on the Soft Surface”, Proceedings of INCOM-18, pp. 709-712, 2018.

2. Sumit Kumar, Sri Ganesh Subramanian, Sunando DasGupta, and Suman Chakraborty, “Elasticity modulated Electrowetting of a sessile liquid droplet”, Bulletin of the American Physical Society, vol 62, 2017.

3. Sumit Kumar, Somnath Chakrabarti, Dipak Kumar Mandal, and Snehmoy Majumder, “A Numerical Investigation on Fluid Flow through a Sudden Expansion”, Journal of energy, heat and mass transfer (JEHMT), Vol. 36, pp. 81-101, 2014.

4. Sumit Kumar, “The EDL effect in microchannel flow: a critical review”, IJACR, Vol. 3 (4), pp. 242-250, 2013.

5. Sumit Kumar and Somnath Chakrabarti, “The effect of aspect ratio and Reynolds number on the nature of recirculating bubble and velocity profile in fluid flow within a sudden expansion configuration” proceedings of international conference on advances in mechanical engineering and its interdisciplinary areas (ICAMEI-2012), 27TH – 28TH , December, 2012, CEMK, Kolaghat, India.

6. Bijit Kumar Dey, Asim Guha, Sumar Kumar and Somnath Chakrabarti, “Effect of contraction ratio and Reynolds number on centre-line velocity and effective length for a plain suddenly contracted nozzle” proceedings of international conference on advances in mechanical engineering and its interdisciplinary areas (ICAMEI-2012), 27th – 28th , December, 2012, CEMK, Kolaghat, India.

7. Sumit Kumar and Somnath Chakrabarti, “Study on average static pressure characteristics and their related important parameters in case of a sudden expansion configuration used as a diffuser”, Proceedings of UGC national conference on advances in computer integrated manufacturing (NCACIM-II) March 16-17, 2012 JNVU, Jodhpur, India.

8. Kumar, S., Kumar, P., DasGupta, S., & Chakraborty, S. (2019). Electrowetting of a nano-suspension on a soft solid. Applied Physics Letters, 114(7), 073702.