Sustaining dry surfaces under water [news]

A team of researchers, led by Northwestern, identify a critical roughness scale for maintaining dry immersed surfaces. Collaborating institutions include: ETH Zürich, Arizona State University, MIT, University of Illinois at Chicago, and Tech. University of Denmark. more. Published article

Drag and thrust on swimming Knifefish

Traditional analyses of self–propulsion decompose the total force on a swimming body into drag (reverse) and thrust (foward); however, during steady self–propulsion, these forces balance. We have developed a different drag-thrust framework that helps to explain how undulatory organisms swim. more

Stabilizing the Leidenfrost film collapse [news]

The surfaces of a steel sphere was covered with a superhydrophobic coating to stabilize the collapse of the Leidenfrost film layer. This film formed during pool boiling when the surface was too hot to become wet by the ambient liquid. more

Three-dimensional eel swimming

An eel forces its muscles to move from side-to-side in the lateral direction in order to propel itself foward. A wake of vorticies are shed behind the swimming organism. more

Next-generation superhydrophobic coatings

Hierarchical structures, consisting of nanoscale and microscale geometries, were used to generate robust non-wetting surfaces. These surfaces may be used to repel water from objects such as raincoats or automobiles. more. Published article


APS DFD: Ph.D. students: Walter, Nishant, & Brennan present their work at the 68th Annual APS DFD Meeting. November 22-24, 2015

New website: The Patankar Research Group has a new website. November 21, 2015

New students: Shashank Acharya, Bridget Popovic, Angela Yang, Jiahui Liu, & Sunghwan Park join our group. September 2015

Our focus

  • To design textured metasurfaces to control heterogeneous phase transition (non-wetting surfaces, boiling, condensation, anti-icing, etc.)
  • To develop the constraint–based paradigm for fully resolved simulations of freely moving or self–propelling immersed bodies in fluids
  • To apply CFD to gain insights into the function of organs (esophagus) and organisms (movement)
  • To demonstrate fluctuating hydrodynamics mesoscale simulation as a viable technique to study biomolecules
  • To develop novel metrics to quantify efficiency of self-propelled organisms (swimming/flying) and machines (underwater vehicles/cars)

Contact Information

Prof. Neelesh A. Patankar
Department of Mechanical Engineering
Northwestern University
2145 Sheridan Road, Evanston, IL 60208-3111
Phone: (847) 491-3021
Fax: (847) 491-3915
Email: n-patankar (at) northwestern dot edu

Featured publications

Sustaining dry surfaces under water. [news]
Researchers identify a critical roughness scale. more
Convergent evolution. [news]
An optimal swim stroke was discovered for ribbon-finned based marine life. more
Boiling without bubbles. [news] Superhydrophobic surfaces stabilized the Leidenfrost effect. more