Vatsal Sanjay
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comphy-lab.org
Vatsal Sanjay
@comphy-lab.org
Fluid dynamicist | Assistant Professor, Physics Department, Durham University | ex-PoF (Univ. Twente) | IITR alum | soft-matter & non‑Newtonian flows (drops, bubbles, jets, sheets) | #FluidDynamics #SoftMatter #Drops #Bubbles #DNS
🌀 Finally, the Droplet-B regime at high De (fixed Ohp) resembles Newtonian-like behavior again, where jets form and pinch off at the base. Surprisingly, the elastic stresses are too low to prevent this, highlighting the complexity of EVP fluid dynamics. [5/5]
December 6, 2024 at 2:35 PM
💧 In the No Pinch-Off regime, at moderate De, jets form but do not break into droplets. Elastic stresses balance the capillary forces--thanks to slow elastic stress relaxation. Plasticity has no impact here. This is analogous to the jet suppression we further elucidate in tinyurl.com/2dbpky9t
[4/5]
December 6, 2024 at 2:34 PM
🔧 The second regime, No Jet, is observed at high J and low De. Here, increased plasticity prevents jet formation due to enhanced apparent viscosity, leading to a non-flat final shape as the cavity motion slows down. [3/5]
December 6, 2024 at 2:31 PM
🔍 We identify four distinct regimes of bubble bursting in EVP media, characterized by varying Deborah (De) and plastocapillary (J) numbers. The first regime, Droplet-A, occurs at low De and J, where the behavior resembles Newtonian fluids, producing droplets from the Worthington jet. [2/5]
December 6, 2024 at 2:29 PM