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\title{ACS AMA: Hi Reddit! I am Neelesh Patankar, Associate Chair of Mechanical
Engineering at Northwestern University. Ask me anything about rough
surfaces for non- or super-wetting, or other novel phase change
properties!}



\author[1]{AmerChemSocietyAMA }%
\author[1]{r/Science AMAs}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{April 23, 2026}


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\begin{abstract}
ACS AMA Hi Reddit! My name is Neelesh A. Patankar, and I am the Charles
Deering McCormick Professor of Teaching Excellence and Associate Chair
of the Department of Mechanical Engineering at Northwestern University.
Following my Ph.D. in Mechanical Engineering at University of
Pennsylvania, I was a post-doctoral associate with Prof. Daniel D.
Joseph at the University of Minnesota until 2000. I then joined the
Department of Mechanical Engineering at Northwestern University as an
Assistant Professor in 2000, and have been a Professor since 2011. My
research area is developing computational methods for immersed bodies in
fluids and applying them to problems in biology (fish swimming,
esophageal transport, rat whiskers) and engineering (vehicle
aerodynamics). I have also been active in designing rough surfaces for
non-wetting, super-wetting, anti-icing, and novel phase change
properties. My group has published a series of papers on the
thermodynamics of phase change on rough surfaces. Topics include keeping
surfaces dry under water (see a short video here), restoring underwater
superhydrophobicity, changing the boiling curve by extending or delaying
the Leidenfrost regime, and the thermodynamics of sustaining vapor,
``non-condensable'' gases, and superheated liquids in roughness pores. I
also recently acted as a scientific consultant for an ACS Reactions
video on the Leidenfrost effect. The broader research vision is to
engineer metasurfaces, that is surfaces that exhibit novel interfacial
interactions during heterogeneous phase transition (e.g. condensation,
boiling, freezing). Potential application areas include boiling and
condensation heat transfer (e.g. in power plants), anti-icing,
anti-fouling, and atmospheric water harvesting, among others. I will be
answering your questions on the topics of rough surfaces for
non-wetting, super-wetting, or novel phase change properties at 11am EDT
(10am CDT, 8am PDT, 3pm UTC) -ACS edit text formatting 08:45 ET%
\end{abstract}%



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