[Faculty] Fwd: [CSRC.COLLOQUIUM] "Fully resolved simulations for fluids, structures, and their interactions"

[Jose Castillo]

<https://lh3.googleusercontent.com/-ZPFNPh16sR0/Wt39FrXUP-I/AAAAAAAAAaw/3wQunGe20lUopmV_ggfPaDwE9cVAgVzxgCLcBGAs/s1600/image001.jpg>

DATE:  *Friday, August 31, 2018*




TITLE:


*Fully resolved simulations for fluids, structures, and their interactions*




TIME:  *3:30PM*



LOCATION:  *GMCS 314*



SPEAKER/BIO:


*Amneet Bhalla, Assistant Professor, Department of Mechanical Engineering,
SDSU*





ABSTRACT:

Fluid-structure interaction (FSI) problems are ubiquitous in engineering
and biological/medical fields. Efficient modeling of FSI problems not only
helps to visualize flow fields, but also improves the device design by
experimenting with virtual geometries created on a computer. In this talk,
I will present an efficient computational framework utilizing the immersed
boundary (IB) technology for modeling FSI problems for a range of
applications. First, I will introduce the IB methodology to resolve FSI
problems. Later, I will focus on FSI applications in the areas of aquatic
locomotion, and multiphase flows. For aquatic locomotion, I will answer two
fundamental fluid mechanics questions. The first question pertains to
splitting of hydrodynamic forces into drag and thrust for an undulatory
swimmer. Undulatory swimmers do not have demarcated drag and thrust
producing spatial regions, unlike an airplane’s fuselage (drag) and
propellers (thrust). Using fully resolved simulations, I will show that it
is still possible to split drag and thrust for undulatory swimmers even at
high Reynolds number. The second question pertains to the convergent
evolution of optimal specific wavelength of elongated fins observed in
various vertebrates and invertebrates. These species diverged on the
tree-of-life millions of years ago. Using simulations, we find that the
observed specific deformation pattern of the fins is thrust maximizing,
thereby increasing their chance of survival. For multiphase flows, I will
present results on a coupled level set and IB method to simulate three
phase (solid, gas, and liquid) flows using a strongly coupled
velocity-pressure flow solver. Finally, I will present applications of this
novel multiphase solver in modeling wave energy converters and windmill
simulations.
  HOST:  Parag Katira

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