TY - JOUR
T1 - Seeking simplicity for the understanding of multiphase flows
AU - Stone, Howard A.
N1 - Funding Information:
Funding for some of the work discussed here was provided by the National Science Foundation, ONR (supported under ONR MURI Grants No. N00014-12-1-0875 and No. N00014-12-1-0962, Program Manager Dr. Ki-Han Kim), and Unilever Research. I am very grateful for this support. I thank W. M. Hamner for providing further information on the images of the phalarope shown in Fig. 1 . I thank the many people whose work is discussed in this article, as the discussion above should make clear that I have benefited and learned from collaborations with many people.
Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/10
Y1 - 2017/10
N2 - Fluid mechanics is a discipline with rich phenomena, with motions occurring over an enormous range of length scales, and spanning a wide range of laminar and turbulent flows, instabilities, and applications in industry, nature, biology, and medicine. The subfield of complex fluids typically refers to those flows where the complexity is introduced, for example, by the presence of suspended particles, multiple phases, soft boundaries, and electrokinetic effects; several distinct multiphase flows of Newtonian fluids make up the examples in this article. Interfaces play a significant role and modify the flow with feedback that further changes the shapes of the interfaces. I will provide examples of our work highlighting (i) new features of classical instabilities triggered by changes in geometry, (ii) multiphase flows relevant to the design of liquid-infused substrates exhibiting effective slip while retaining the trapped liquid, and (iii) unexpected dynamics in flow at a T-junction. The interplay of experiments and mathematical models and/or simulations is critical to the new understanding developed.
AB - Fluid mechanics is a discipline with rich phenomena, with motions occurring over an enormous range of length scales, and spanning a wide range of laminar and turbulent flows, instabilities, and applications in industry, nature, biology, and medicine. The subfield of complex fluids typically refers to those flows where the complexity is introduced, for example, by the presence of suspended particles, multiple phases, soft boundaries, and electrokinetic effects; several distinct multiphase flows of Newtonian fluids make up the examples in this article. Interfaces play a significant role and modify the flow with feedback that further changes the shapes of the interfaces. I will provide examples of our work highlighting (i) new features of classical instabilities triggered by changes in geometry, (ii) multiphase flows relevant to the design of liquid-infused substrates exhibiting effective slip while retaining the trapped liquid, and (iii) unexpected dynamics in flow at a T-junction. The interplay of experiments and mathematical models and/or simulations is critical to the new understanding developed.
UR - http://www.scopus.com/inward/record.url?scp=85036529914&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85036529914&partnerID=8YFLogxK
U2 - 10.1103/PhysRevFluids.2.100507
DO - 10.1103/PhysRevFluids.2.100507
M3 - Article
AN - SCOPUS:85036529914
SN - 2469-990X
VL - 2
JO - Physical Review Fluids
JF - Physical Review Fluids
IS - 10
M1 - 100507
ER -