Flow & Soft systems
Viscous Streaming
Manipulating flow for microscale applications such as drug manufacture, transport, reagent mixing & separation benefit from inertial processes that are not easily accessible at these scales. Viscous streaming is perhaps the most efficient way to use inertia for such microscale applications, and arises when an immersed body undergoes small-amplitude oscillations in a viscous fluid. Almost nothing is known about it, beyond simple shapes such as cylinders or spheres. We investigated viscous streaming beyond classical settings for the rational manipulation of flow topology, through regulated variation of object geometry. We showcased its use in transport devices (such as a micro-robot delivering drugs to a target cell) and in microfluidic trapping/clearing devices.
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- Bhosale^, Vishwanathan^, Tejaswin Parthasarathy, Juarez, Gazzola.
Multi-curvature viscous streaming: flow topology and particle manipulation, arXiv:2111.07184.
- Chan, Bhosale, Tejaswin Parthasarathy, Gazzola.
Three-dimensional geometry and topology effects in viscous streaming, Journal of Fluid Mechanics, 2022.
- Bhosale, Tejaswin Parthasarathy, Gazzola.
Shape curvature effects in viscous streaming, Journal of Fluid Mechanics, 2020.
- Tejaswin Parthasarathy, Chan, Gazzola.
Streaming-enhanced flow-mediated transport, Journal of Fluid Mechanics, 2019. _Cover_
Soft systems immersed in flows
Soft, elastic and compliant structures immersed in flows are ubiquitous in engineering and biology, and especially in soft robotics, bio-medical and microfluidic devices. To dissect the mechanisms underlying such systems, we have analyzed archetypes of soft structure–flow interaction, using theoretical and numerical methods. The insights gained potentially pave way for novel means of flow manipulation in applications such as drug-delivery via compliant robotic devices.
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- An online sandbox I made to investigate the dynamics of an archetypal immersed soft structure.
- Tejaswin Parthasarathy, Bhosale, Gazzola.
A hyperelastic oscillatory Couette system, arXiv:2011.09453.
- Tejaswin Parthasarathy^, Bhosale^, Gazzola.
A remeshed vortex method for mixed rigid/soft body fluid–structure interaction., Journal of Computational Physics, 2021.
- Zhang, Chan, Tejaswin Parthasarathy, Gazzola.
Modeling and simulation of complex dynamic musculoskeletal architectures, Nature Communications, 2019.
Filamentous soft creatures
From bridges and DNA to shoelaces, the ubiquity of elastic rods or filaments plays an important role in everyday life. We developed a numerical model for the simulation of soft filaments deforming in three-dimensional space, and accounting for all possible deformation modes, bending, twisting, shearing and stretching at every cross-section. These assemblies of soft tods are able to interact with the environment via models of muscular activity, sensory feedbacks, self-contact, surface friction and hydrodynamics, thus providing a physically accurate virtual playground to inquire into the functioning of complex muscular and robotics architectures.
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- An online sandbox I made to investigate limbless locomotion by soft snakes.
- Zhang, Naughton, Tejaswin Parthasarathy, Gazzola.
Friction modulation in limbless, three-dimensional gaits and heterogeneous terrains, Nature Communications, 2021.
- Naughton, Sun, Tekinalp, Tejaswin Parthasarathy, Chowdhary, Gazzola.
Elastica: A compliant mechanics environment for soft robotic control, IEEE Robotics and Automation Letters, 2021.
- Chang, Halder, Shih, Tekinalp, Tejaswin Parthasarathy, Gribkova, Chowdhary, Gillette, Gazzola, Mehta. Energy shaping control of a CyberOctopus soft arm, IEEE Conference on Decision and Control (CDC), 2020.
- Zhang, Chan, Tejaswin Parthasarathy, Gazzola.
Modeling and simulation of complex dynamic musculoskeletal architectures, Nature Communications, 2019.