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- S. Kumar Ranjith, B. S. V. Patnaik, Srikanth Vedantam
- J. Comput. Physics
- 2013

- Srikanth Vedantam, Mahesh V Panchagnula
- Physical review letters
- 2007

We propose a novel approach to describe wetting of plane solid surfaces by liquid drops. A two-dimensional nonconserved phase field variable is employed to distinguish between wetted and nonwetted regions on the surface. The imbalance in the Young's force provides for the exchange of relative stability of the two phases. The three-phase contact line tension… (More)

- Srikanth Vedantam, B. S. V. Patnaik
- Physical review. E, Statistical, nonlinear, and…
- 2006

Phase-field models have emerged as a successful class of models in a wide variety of applications in computational materials science. Multiphase field theories, as a subclass of phase-field theories, have been especially useful for studying nucleation and growth in polycrystalline materials. In theory, an infinite number of phase-field variables are… (More)

- Srikanth Vedantam, Mahesh V Panchagnula
- Journal of colloid and interface science
- 2008

We introduce a phase field model of wetting of surfaces by sessile drops. The theory uses a two-dimensional non-conserved phase field variable to parametrize the Gibbs free energy of the three-dimensional system. Contact line tension and contact angle hysteresis arise from the gradient term in the free energy and the kinetic coefficient respectively. A… (More)

- Mahesh V Panchagnula, Srikanth Vedantam
- Langmuir : the ACS journal of surfaces and…
- 2007

- S. Kumar Ranjith, B. S. V. Patnaik, Srikanth Vedantam
- Soft matter
- 2014

In this work, we numerically study a new means of manipulating single DNA chains in microchannels. The method is based on the effect of finite slip at hydrophobic walls on the hydrodynamics and, consequently, on the dynamics of the DNA in microchannels. We use dissipative particle dynamics to study DNA transport as a function of chain length and the… (More)

- Dhakshinamurthy Vijay Anand, B. S. V. Patnaik, Srikanth Vedantam
- Soft matter
- 2017

In this paper, we investigate the dynamics of a tethered flexible filament due to fluid flow inside a microchannel. We use the finite sized dissipative particle dynamics (FDPD) approach to model this problem. The flexible filament is modeled as a bead-spring system with both extensional and flexural rigidity. The influence of flow rate and bending stiffness… (More)

- Bharadwaj Prabhala, Mahesh V Panchagnula, V. R. Subramanian, Srikanth Vedantam
- Langmuir : the ACS journal of surfaces and…
- 2010

We develop an approximate analytical solution for the shape of a nonaxisymmetric sessile drop using regular perturbation methods and ignoring gravity. We assume that the pinned, contorted triple-line shape is known and is a small perturbation of the circular footprint of a spherical cap. We obtain an analytical solution using regular perturbation methods… (More)

- Pallab Sinha Mahapatra, Ajinkya Kulkarni, Sam Mathew, Mahesh V Panchagnula, Srikanth Vedantam
- Physical review. E
- 2017

We study the collective motion of a dense suspension of active swimmers in a viscous fluid medium. The swimmers are modeled as soft spheres moving in a highly viscous fluid medium. The magnitude of the propelling thrust exerted by each particle is taken to be a constant and the direction is aligned to its velocity. Depending on the magnitude of the exerted… (More)

- Neeharika Anantharaju, Mahesh V Panchagnula, Srikanth Vedantam, Sudhakar Neti, Svetlana Tatic-Lucic
- Langmuir : the ACS journal of surfaces and…
- 2007

Cassie-Baxter theory has traditionally been used to study liquid drops in contact with microstructured surfaces. The Cassie-Baxter theory arises from a minimization of the global Gibbs free energy of the system but does not account for the topology of the three-phase contact line. We experimentally compare two situations differing only in the microstructure… (More)