More Like this

1. Fluid–fluid phase transitions in a chiral molecular model

   https://doi.org/10.1063/5.0105851  

   Wang, Yiming; Stillinger, Frank H.; Debenedetti, Pablo G. (August 2022, The Journal of Chemical Physics)

   Molecular chirality is a fundamental phenomenon, underlying both life as we know it and industrial pharmaceutical syntheses. Understanding the symmetry breaking phase transitions exhibited by many chiral molecular substances provides basic insights for topics ranging from the origin of life to the rational design of drug manufacturing processes. In this work, we have performed molecular dynamics simulations to investigate the fluid–fluid phase transitions of a flexible three-dimensional four-site chiral molecular model developed by Latinwo et al. [J. Chem. Phys. 145, 154503 (2016)] and Petsev et al. [J. Chem. Phys. 155, 084105 (2021)]. By introducing a bias favoring local homochiral vs heterochiral interactions, the system exhibits a phase transition from a single achiral phase to a single chiral phase that undergoes infrequent interconversion between the two thermodynamically identical chiral states: the L-rich and D-rich phases. According to the phase rule, this reactive binary system has two independent degrees of freedom and exhibits a density-dependent critical locus. Below the liquid–liquid critical locus, there exists a first-order vapor–liquid coexistence region with a single independent degree of freedom. Our results provide basic thermodynamic and kinetic insights for understanding many-body chiral symmetry breaking phenomena. 

   more » « less
2. A new high-temperature borehole fluid sampler: the Multi-Temperature Fluid Sampler

   https://doi.org/10.5194/sd-28-43-2020  

   Wheat, C. Geoffrey; Kitts, Christopher; Webb, Camden; Stolzman, Rachel; McGuire, Ann; Fournier, Trevor; Pettigrew, Thomas; Jannasch, Hans (January 2020, Scientific Drilling)

   null (Ed.)

   Abstract. Deep (>1 km depth) scientific boreholes are unique assetsthat can be used to address a variety of microbiological, hydrologic, andbiogeochemical hypotheses. Few of these deep boreholes exist in oceaniccrust. One of them, Deep Sea Drilling Project Hole 504B, reaches∼190 ∘C at its base. We designed, fabricated, andlaboratory-tested the Multi-Temperature Fluid Sampler (MTFS), a non-gas-tight, titanium syringe-style fluid sampler for borehole applicationsthat is tolerant of such high temperatures. Each of the 12 MTFS unitscollects a single 1 L sample at a predetermined temperature, which isdefined by the trigger design and a shape memory alloy (SMA). SMAs have theinnate ability to be deformed and only return to their initial shapes whentheir activation temperatures are reached, thereby triggering a sampler at apredetermined temperature. Three SMA-based trigger mechanisms, which do notrely on electronics, were tested. Triggers were released at temperaturesspanning from 80 to 181 ∘C. The MTFS was set fordeployment on International Ocean Discovery Program Expedition 385T, buthole conditions precluded its use. The sampler is ready for use in deepoceanic or continental scientific boreholes with minimal training foroperational success. 

   more » « less
3. Gellan Fluid Gel as a Versatile Support Bath Material for Fluid Extrusion Bioprinting

   https://doi.org/10.1021/acsami.8b13792  

   Compaan, Ashley M.; Song, Kaidong; Huang, Yong (January 2019, ACS Applied Materials & Interfaces)
4. Non-Newtonian fluid–structure interaction: Flow of a viscoelastic Oldroyd-B fluid in a deformable channel

   https://doi.org/10.1016/j.jnnfm.2023.104990  

   Boyko, Evgeniy; Christov, Ivan C. (March 2023, Journal of Non-Newtonian Fluid Mechanics)
5. Toward a fluid mechanics of suspensions

   https://doi.org/10.1103/PhysRevFluids.5.110519  

   Morris, Jeffrey F. (November 2020, Physical Review Fluids)

   null (Ed.)