Dr. Kourosh Shoele is an assistant professor in the Department of Mechanical Engineering at Florida State University. Previously, he was an assistant research scientist in the Flow Physics and Computation Laboratory in the Department of Mechanical Engineering at Johns Hopkins University (2013-2016), research engineer at Re Vision LLC (2011-2013) and a post-doctoral research assistant (2011) in the Department of Structural Engineering at the University of California, San Diego (UCSD). He received his Ph.D. from the University of California, San Diego (UCSD) in 2011. His doctoral dissertation was about flow interaction with flexible structures. He received his M.Sc. from the Sharif University of Technology in 2006, and he received his B.Sc. from Shiraz University in 2003.
Research Themes: Dr. Shoele and his group are studying problems at the interface between mechanics and physics through developing and applying mathematical and computational tools with a focus on fluid-structure interaction, renewable energies, biolocomotion, and biomechanics.
Research Areas: Bio-inspired Engineering, Fluid-Structure Interaction, Biomechanics & Biomedical Flows, Wind & Wave Energies, Computational Mechanics.
Fluid-Structure Interaction(FSI) happens during the forced/free oscillations of the airfoil, fluttering of the flag(inverted/non-inverted) or the panel in the wind, pumping the blood inside the heart, vibrations of the wings of the airliner, efficient swimming of the fish in the deep sea and many more. FSI involves several interactions techniques known as flutter, galloping, sloshing, vortex-induced vibrations, added mass, and etc which are used to control the dynamics and motion of both the fluids and solids.
Nucleate boiling and active vortex generation
The nucleate boiling process is essential to achieve extreme heat flux in heat exchangers and cooling systems. We have proposed using active vortex generation to manipulate the boiling process dynamics. We have simulated the response of the boiling process in a heat exchanger channel to an oscillating flexible/rigid/hybrid plates and found out the extent of thermal enhancement and effects on dynamics of the vapor bubble. Our preliminary results show that surprisingly, a specific type of active vortex generators may enhance the thermal heat transfer by 500%-1000% much more than other proposed techniques. Considering the impact of active vortex generators compared to the crossflow-only case, we found out that by using a flexible insert, one can reach a 200%-250% increase in the coefficient of performance. The initial results suggest a promising technique to have a paradigm-shift heat transfer enhancement methodology especially for boiling heat transfer in microchannels using minimally invasive piezoelectric or magnetic vortex generators. Further studies will increase our understanding of the critical features of this process, also gives the suitable parameter regimes for experimental studies and practical applications. This may lead to an economical thermal management procedure using a passive system for the real-world applications.
SWBLI with flexible structure
When a shock wave comes into contact with a boundary layer flow, the large adverse pressure gradient associated with the shock wave can cause the flow to separate from the surface. When this happens, a recirculation bubble forms close to the wall, and significantly alters the stability and dynamics of the flow. This shock typically bends as it encounters lower Mach numbers inside the boundary layer and ultimately breaks up into a compression fan and a reflected shock develops. We are doing research on SWBLI with flexible structure focusing on structural load minimization and flow control. Panel dynamics can help us to find a potential use of an aeroelastically tailored flexible panel as a means of passive flow control. Cavity pressure underneath the panel can also create forced panel oscillations which may reduce separation in the interaction zone.
Wind induced reconfigurations of trees
Wind induced stresses are the major mechanical cause of failure in trees. Our aim is to prevent tree failures from happening due to harsh hurricane–like conditions; helping the department of environment plant trees that have the right reconfiguration ability to withstand such conditions. Trees generally break at a point where they experience maximum stress. Through simulations analytical reasoning, we have seen that the prediction of the fracture risk and pattern of a tree is a function of their reconfiguration capabilities and how they mitigate large wind-induced stresses. Also, the probability of a tree breaking at any point depends on both the cross-section changes in the branching nodes and the level of tree flexibility. It has been noted that at an optimal branching, the stress experienced on a tree is uniform, thereby causing no weak link on the tree. This, in turn, doesn’t make the tree break during harsh conditions since there is no overstress throughout the cross-section of the tree. Prevention of tree failure will lead to a reduced power outage during storms.
Wind Turbine Aerodynamics
A computational model is used to study the effect of wave-induced motion on the aerodynamics of compliant offshore wind turbines. The wake response of two promising offshore platform concepts, Spar buoy and Barge type turbines were studied in details and their aerodynamic, power and wake characteristics were compared with a stationary wind turbine case. Results obtained from this study indicates that surprisingly the wake response of the oscillating wind turbine recovers faster compared to the stationary turbine, with a 50%wake recovery in a distance that is 33% shorter than the static counterpart.
Active Control of the Aeroelastic Flutter
Aeroelastic effect plays an important role in various research topics including aero vehicle stability, renewable energy extraction, and animal locomotion. Active and passive control methods have been proposed to control the flutter phenomenon of the airfoil. For example, the EET high-lift flexible wing with actively bending flaps provides an active actuator that can modify the flow around the airfoil. Through the use of a high-fidelity fluid-structure interaction algorithm we can investigate the effect on the aeroelastic motion of the EET airfoil over a wide range of parameters. Preliminary results show that the active flap is capable of regulating the oscillation period of the airfoil. The simulations can provide physical insight behind the highly nonlinear motion, and eventually derive the control law to regulate the oscillation.
Post Doctorate Fellows
Mehdi received his Ph.D. in Applied Science in 2014 from University of California Davis. He has been working on development and application of numerical methods for multi-material and multi-phase systems. He is currently focused on the development of a general purposed Fluid-Structure Interaction (FSI) multiphase code to support the group endeavorer to study fundamental and real-world problems. He is also investigating the effects of active vortex generators of heat transfer and phase-change dynamics. You can find out more about his research and previous works at mehdivahab.com..
Graduated from Florida State University with a BS in Mechanical Engineering in 2016. Currently a PhD candidate with a focus in theoretical and numerical thermal fluids studies. Researching fluid-thermal-structure interactions and its application to thermal management and renewable energy generation. Interests include computational fluid dynamics (CFD), reduced order modeling (ROM), and optimization, with specific applications to energy.
Al Shahriar is a Ph.D. student in Mechanical Engineering Program at Florida State University since Fall 2017. His research concentrates on Fluid-Structure Interaction(FSI). More specifically, he is investigating fundamental and unsteady flow features of the shock wave and boundary layer interactions (SWBLI) over a flexible structure and how can the structural response be utilized to deal with this adverse flow phenomena. His research interest includes (but not limited to) High-speed flows, aerodynamic shape optimization, flow controls, FSI and CFD. He enjoys fine arts especially paintings, photography, table tennis, traveling and outdoor activities.
I am Oluwafemi Ojo, a graduate student in Mechanical Engineering. I had my B.Tech in Metallurgical and Materials Engineering in The Federal University of Technology Akure Nigeria. I transferred to FAMU in my senior year to complete my undergraduate degree. I am currently pursuing my PhD in Mechanical Engineering in FAMU-FSU College of engineering. My current research is on Tree dynamics, to prevent tree failures in hurricane conditions. Research Interests: Numerical simulations in Solid Mechanics and Fluid Dynamics.
Tso-Kang Wang is pursuing a Ph.D. degree in Mechanical Engineering. His research topic is about controlling the complicated interaction between flow and structures. The beauty and sophistication of Nature has been driving him to the research career, and his goal is to use what he has learnt to help this world become a more harmonic place. His favorite leisure activities are reading, basketball, and video games.
Karsten Mikal Kopperstad received his Bachelor's degree in mechanical engineering at the University of Stavanger in Stavanger, Norway. Prior to this he served in the Norwegian Royal Navy as a fulfillment of his Norwegian citizenship duties . Karsten is now currently pursuing a Master's degree in mechanical engineering at FAMU-FSU College of Engineering, under the guidance of Dr. Koroush Shoele and Dr. Rajan Kumar. Karsten is working as a graduate research assistant at the Florida Center for advanced Areo Propulsion facility located in Tallahassee, Florida. His research interest includes experimental and computational fluid mechanics, fluid structure interaction, and renewable energy. During his pursuit for his master’s, Karsten is conducting research of the aerodynamic properties found in the wake regime behind a floating wind turbine.
PhD Research Assistant
Patrick Eastham received his B.S. in Applied and Computational Mathematics from Florida State in 2015. He is currently at PhD student in the Biomathematics program at FSU. He was a research assistant for Dr. Shoele in 2017 and has since continued that line of research while being funded as a NSF GRFP Fellow. He has worked on the effect of variable-viscosity mechanisms on the swimming and feeding efficiency of microorganisms with applications towards artificial microswimmers, and more generally is interested in problems in biofluidmechanics.
Former Group Members
Gokhan Ozkan received his BS degrees in Teacher Training in Electrical Field and Energy System Engineering from Marmara University and Erciyes University, Turkey in 2006 and 2014, and his MS in Energy System Engineering from Erciyes University, Turkey in 2016. He was a lecturer at Bozok University, Turkey. He is currently a PhD candidate in Electrical and Computer Engineering at FAMU-FSU College of Engineering, and is working as a graduate research assistant at the Center for Advanced Power Systems. His research interests include control of renewable energy, especially wind energy, electricity generation, distribution, and transmission. His Areas of experties are Renewable energy, Controls, Wind energy systems.