Bio-inspired navigation strategies in turbulent plumes

Figure-legends_W640Jointly with Roi Gurka, Ally Harari (Volcani Center)and Gregory Zilman we developed a concept of bio-inspired navigation in turbulent plumes. 

 

 

We performed numerical simulations and experiments in a wind tunnel with flying moths to study the dispersion of scalar plumes and moth navigation to a female. 

The-experimental-setup-of-the-open-loop-wind-tunnel-with-the-optical-access-dual-head_W640Recently Yiftach Golov joined our team and added collaboration with the group of Shlomo Margel (Bar Ilan) to add nano-materials research to the question of olfactory sensing and navigation of moths in turbulent environments. Yiftach also works on the moth tracking in 3D in Volcani Center wind tunnel w/o turbulence and various source competitions. 

 

A-sketch-of-a-series-of-discrete-puffs-and-the-trajectories-of-a-male-moth-view-from_W640

 

We also have Noam Benelli helping us to develop a numerical model of various navigation strategies using a unified Python platform for repeatable and fast simulations. 

Turbulent flows for the offshore macroalgae biorefinery

Our group collaborates with Dr. Alexander Golberg group from the Porter School of Environmental Studies on the marine biorefinery idea:  https://m.tau.ac.il/~agolberg/MBR.html 

 

Source: https://en-environment.tau.ac.il/MOBI_Workshop_2017_summary

Hadar Traugott studies hydrodynamic effects (pressure, hydromechanical shear stresses) on the macroalgae growth rates and chemical content. 

 

Meiron Zollmann focuses on the nutrients uptake and growth rates in the laboratory and natural offshore environments

 

Oz Habiby has been working on the pulsed light concept in our lab, growing algae in a hypothetical light/dark cycle using LED sun simulator. 

 

Wakes

Fluid flow wakes are the hydrodynamic signatures left by a moving body or carried by a fluid passing a body at some relative velocity. In dictionaries it is defined as “a trail of disturbed water or air left by the passage of a ship or aircraft”. Of course there are many other meanings of this word, but we focus here on only the fluid flows. More specifically our lab deals with turbulent wakes. 

A stratified wake of a hydrofoil accelerating from rest

 1-s2.0-S0894177715002769-gr1 1-s2.0-S0894177715002769-gr8

 

Vortex wake of a swimming knifefish 

An-example-of-an-instantaneous-PIV-image-with-velocity-vectors-overlaid-in-the-laboratory_W640Left-the-speed-of-the-knifefish-U-f-the-speed-of-the-vortices-U-w-the-width-of-the_W640

 

 

Wake behind a flapping free flying bird in a wind tunnel

 

journal.pone.0134582.g002 journal.pone.0134582.g006

 

If you want to get more details about these results, please read our papers here

 

Turbulent wakes of roughness elements in an urban canopy flow measured in Lagrangian framework in the environmental scale wind tunnel 

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Demitry Aronovsky

demitry

Demitry Aronovsky – lab engineer

Demitry Aronovsky is our lab engineer from Jan. 1, 2019. Demitry brings his vast experience from successful positions he took at industry. https://www.linkedin.com/in/demitry-aronovsky-10914957/ 

Ben Torteman

Ben Torteman is a M.Sc. student on a direct track, that we co-advise with Prof. Slava Krylov. Ben works on a problem of parametric resonance of bistable structures and thinks on how to apply it as a flow sensing principle. 

 

 

 

Hadar Traugott had successfully passed Ph.D. candidacy exam

Hadar has completed her Ph.D. candidacy exam and started her main, important phase of the Ph.D. research. We are looking forward for her contribution to the hydrodynamic effects on algae growth. Hadar is co-supervised by Dr. Alexander Golberg from the Porter School of Environmental and Earth Sciences. 

Hadar is a Boris Mints Institute scholar, working on one of the central aspects in intensification of biomass production – the relation between applied stresses, growth and content of seaweeds. 

 

From the Renewable Energy Center page: 

https://www.bmiglobalsolutions.org/renewable-energy-lab

Hadar completed a M.Sc. in mechanical engineering in the field of fluid dynamics, at the Tel Aviv University. Since then has worked as a researcher at ICL (Dead Sea Works) R&D. Hadar’s Ph.D. research focuses on the subject of “Off shore biorefinery for the biofuel production” under the supervision of Prof. A. Liberzon and Dr. A. Golberg.  The goal of the research is to develop tools and technologies to increase the net energy return of offshore biorefineries for biomass production. Current strategies for food production and renewable energy generation rely heavily on the classic land based agriculture. However, land availability is the limiting factor.