Joshua B. Bostwick                                                                                                                                                                                                                                                                        

Assistant Professor                                                                                       
Department of Mechanical Engineering, Clemson University

Office: Fluor Daniel 219
Phone: (864) 656-5625
Address: Fluor Daniel Building, Clemson, SC, 29634
E-mail:  jbostwi@clemson.edu

Office Hours: W 3:00-5:00 and by appointment                                      


RESEARCH

My research addresses fundamental problems in fluid transport with an emphasis on wetting and spreading. In addition to widespread industrial and technological application, fluid transport
on solid substrates typifies the multiple-scale
problem, as bulk, surface and line forces are coupled through a free-boundary problem. My primary interest lies in the interaction between the
free boundary and solid substrate known as the three-phase contact-line and how this influences
fluid motion. More broadly, I am fascinated by surface tension related phenomena and
particularly the physics and
mathematics associated with pattern formation on liquid interfaces. I am attracted to such problems because it is often possible to elucidate the underlying physics
with clean mathematics, leading to analysis and numerical simulations to
compare to experiments. Current areas of research address:


(courtesy of K. Daniels)

(courtesy of C. Chang)


(courtesy of J. Dijksman)


Elastocapillarity Drops Marangoni-driven thin film flows Liquid bridges and rivulets

PUBLICATIONS

  1. M. Grzelka, J.B. Bostwick and K.E. Daniels. "Capillary fracture of ultrasoft gels: variability and delayed nucleation." Soft Matter. 13, 2962-2966 (2017). [Link]
  2. J.B. Bostwick, J.A. Dijksman, and M. Shearer. "Wetting dynamics of a collapsing fluid hole." Physical Review Fluids. 2, 014006 (2017). [Link]
  3. J.B. Bostwick and P.H. Steen. "Response of driven sessile drops with contact-line dissipation." Soft Matter. 12, 8919-8926 (2016). [Link]
  4. J.B. Bostwick, M.J. Miksis and S.H. Davis. "Elastic membranes in confinement." Journal of the Royal Society Interface. 13 (120), (2016). [Link]
  5. J.B. Bostwick and P.H. Steen. "Stability of constrained capillary surfaces." Annual Review of Fluid Mechanics. 47, 539-568, (2015). [Link]
  6. J.B. Bostwick and P.H. Steen. "Liquid bridge shape stability by energy bounding." IMA Journal of Applied Mathematics. 80 (6), 1759-1775 , (2015)  [Link]
  7. C.T. Chang, J.B. Bostwick, S. Daniel and P.H. Steen. "Dynamics of sessile drops. Part 2. Experiment". Journal of Fluid Mechanics. 768, 442-467, (2015). [Link]
  8. J.B. Bostwick and P.H. Steen. "Dynamics of sessile drops. Part 1. Inviscid theory." Journal of Fluid Mechanics. 760, 5-38, (2014). [Link]
  9. J.B. Bostwick, M. Shearer and K.E. Daniels "Elastocapillary deformations on partially-wetting substrates: rival contact-line models". Soft Matter. 10, 7361-7369, (2014). [Link]
  10. J.B. Bostwick and K.E. Daniels. "Capillary fracture of soft gels." Physical Review E. 88, 042410, (2013). [Link]
  11. C.T. Chang, J.B. Bostwick, P.H. Steen and S. Daniel. "Substrate constraint modifies the Rayleigh spectrum of vibrating sessile drops". Physical Review E. 88, 023015, (2013). [Link]
  12. J.B. Bostwick. "Spreading and bistability of droplets on differentially-heated substrates". Journal of Fluid Mechanics. 725, 566-587, (2013). [Link]
  13. J.B. Bostwick and P.H. Steen. "Coupled oscillations of deformable spherical-cap droplets. Part 2. Viscous motions". Journal of Fluid Mechanics. 714, 336-360, (2013). [Link]
  14. J.B. Bostwick and P.H. Steen. "Coupled oscillations of deformable spherical-cap droplets. Part 1. Inviscid motions". Journal of Fluid Mechanics. 714, 312-335, (2013). [Link]
  15. J.B. Bostwick and P.H. Steen. "Stability of constrained cylindrical interfaces and the torus lift of Plateau-Rayleigh". Journal of Fluid Mechanics. 647, 201-219, (2010). [Link]
  16. J.B. Bostwick and P.H. Steen. "Constrained capillary oscillations of a spherical fluid drop". Physics of Fluids. 21, 032108, (2009). [Link]

In preparation:

  1. J.B. Bostwick and P.H. Steen. "The walking droplet instability."
  2. J.B. Bostwick and P.H. Steen. "Rivulet instabilities: varicose and sinuous modes."
  3. J.B. Bostwick and P.H. Steen. "Sessile drop oscillations fill a symmetry-breaking periodic table."

Curriculum Vitae:  [CV]

TEACHING

ME 305 Spring 2017