Jonghyun Hwang
@jonghyun_hwangPh.D. student at Complex Fluids Group at Princeton University
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Levitating soft solids with the Leidenfrost effect. Our work in @PhysRevLett, with @ASouslov @swaitukaitis and James Sprittles from @MicroNanoFlows journals.aps.org/prl/abstract/1…
What is the best gift an academic father can hope from his sons? Michael @suospeaks and Daniel printed all @zhigangsuo's papers and thesis, compiled them into books, and carried them all the way to @SocEngScience They do care about your works @zhigangsuo
My work "Evaporation-Driven Cellular Patterns in Confined Hyperelastic Hydrogels" just got published in @PhysRevLett After preliminary observations while @Mahadevan_Lab @hseas, we uncovered with Bischofberger's lab @MITMechE some of the mystery behind these mesmerizing patterns.
In the heart of World War II, as the Nazis took control of Copenhagen, a peculiar situation took place at the Institute of Theoretical Physics, led by physicist Niels Bohr. Two Nobel laureates Max von Laue and James Franck, fearing the confiscation of their gold Nobel Prize…
Happy to share our recent publication in @PhysRevLett We document that when a bubble bursts at a protein-laden surface, a secondary bubble is entrapped with no subsequent jet drop ejection, contrary to the counterpart observed at a Newtonian surface. journals.aps.org/prl/abstract/1…
@abigail_plummer then developed simulations to model this process, revealing the magnitude and spatial distribution of stresses that build up during swelling—providing a route toward predicting when this phenomenon of self-fracturing is likely to arise. [8/11]
This is a lovely body of work for a range of different fluids - and introduces a new dimensionless group; the Tanner Number Tn! #everythingflows (and sometime fractures!). As a bonus some of the numerically-computed edge profiles even look like the @SoRheology logo ⏳
Congratulations to San To on the perspective article on edge fracture, based on his Ph.D thesis! pubs.aip.org/sor/jor/articl…
We recently published “Polymorphic display and texture integrated systems controlled by capillarity” in @ScienceAdvances In this study, we present a system which consists of flexible fins whose bending direction is simply controlled by the flow rate. science.org/doi/10.1126/sc…
UIUC researchers have developed a new breed of display screens that use flexible fins, varying temperatures and liquid droplets that can be arranged in various orientations to create images. mechse.illinois.edu/news/56778
Guess what the link is between skeleton flowers and tissue properties enabling directional growth responses in plants...it's air channels! Great work by @Ganesh70085019 @martina_legris and many others from @FBM_UNIL and @EPFL biorxiv.org/content/10.110…
H. A. Stone, M. J. Shelley, E. Boyko, A note about convected time derivatives for flows of complex fluids. Soft Matter (2023). dx.doi.org/10.1039/d3sm00…
“I have little use for entropy,” the great Hutchinson once said to me. I pointed out some of his research topics. Rubber elasticity is entropic. Minimizing (free) energy is maximizing entropy in disguise. Fracture and plasticity are entropy generation on steroids.
Our paper on chromosomal branching nucleation and spindle assembly is now out! Many new results in the final version: doi.org/10.1038/s41467… Great work together with @SagarSetru, @shaevitz, @LabPetry, and Howard Stone.
Amazing octopus stretching its tentacles to form a huge balloon filmed by EVNautilus at a depth of around 1,600 meters (5,250 feet).
Find out why @AJTM_M of @Penn thinks food could hit the spot when it comes to breaking down scientific silos and making science more diverse in this interview with @KatRWright physics.aps.org/articles/v16/1…
Seeing a fluid climbing a rotating rod is a classic demo of nonlinear viscoelasticity...but have you ever tried getting quantitative info? Here's how: Rod-climbing rheometry revisited. With @DrRishMore and @LubrizolCorp colloborators. ⏳#everythingflows pubs.rsc.org/en/content/art…
Soft matter never ceases to amaze
The Rheology Comics Project, an SoR Venture Fund Winner, will produce 4 comics to help readers connect technical details to the joys of rheology. Look for Issue 1, “Rheology of Cats,” which uses the basics of stress and strain to ask if cats are solid or liquid!
Jonghyun Hwang, a mechanical and aerospace engineering grad student in Howard Stone’s Complex Fluids Group, demonstrates viscoelastic material, which combines two different kinds of polymers, one stretchable elastic, the other more liquid. #ComplexFluids
A couple of days ago, he walked into the lab, said hi to me and others, and asked me if I was happy. He always takes care of his students with a warm heart. You can feel his love for the community around him in this interview.
"I discovered as a young professor that the best thing I could possibly do... is I would leave my door open, and every day I'd walk into my office, and I would say, 'I hope someone interesting walks in today.'" - Prof. Howard Stone, MAE @Caltech bit.ly/3LLYXSy
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