Taira Lab - Computational Fluid Dynamics

Our group studies a variety of fluid mechanics problems with research interests in the areas of computational fluid dynamics, flow control, data science, network theory, and unsteady aerodynamics. Our studies leverage numerical simulations performed on high-performance computers.

Point of Contact: Kunihiko Taira
Department of Mechanical and Aerospace Engineering, UCLA
email: ktaira[at]seas.ucla.edu, office: Engineering IV, 46-147A, lab: Boelter Hall 4420
CV: [pdf], Google Scholar: [link]

Recent Projects:

Network-based modeling and control of unsteady wakes

Support: AFOSR

We utilize network-theoretic approaches to characterize, model, and control unsteady wakes. [Movie (Presentation)]

Collaborator: S. Brunton (U Wash)

Active control of separated flows

Support: AFOSR (YIP)

We investigate the effects of fundamental flow control inputs on suppressing stall for a canonical airfoil with LES.

Network-based characterization and control of turbulence

Support: ARO

We characterize vortical interactions in 2D and 3D turbulence for its modeling and control.

Collaborator: S. Brunton (U Wash)

Stability and resolvent analyses of separated flows

Support: ONR (YIP)

We examine the stability and input-output characteristics of post-stall flows to support the design of effective active flow control setup.

3D control of high-speed cavity flow

Support: AFOSR

Design of active flow control based on global stability and resolvent analyses for reduction of velocity and pressure fluctuations in high-speed open cavity flows.

Collaborators: L. Cattafesta (FSU), L. Ukeiley (UF)

Analysis of 3D flow separation

Support: AFOSR

We examine the tip and sweep effects on 3D separation physics around wings with DNS/LES, in collaboration with experimental and theoretical partners.

Collaborators: M. Amitay (RPI), V. Theofilis (U Liverpool)

Subsurface vortex characterization and control

Support: Ebara Corporation

This project characterizes and controls the dynamics of subsurface vortices.

Collaborators: B. An, M. Obuchi, M. Nohmi (Ebara)

Attenuation of wing tip vortex

Support: ONR

This project examines the use of instability based control of wing-tip vortex.

Collaborators: L. Cattafesta (FSU), P. Schmid (Imperial College)

Turbulent flow modification with thermoacoustics

Support: ARO

This project studies the possible use of thermoacoustic actuators to modify the characteristics of turbulent shear flows.

Compressible AMR-immersed boundary method

Support: ARO

We are developing a compressible (energy conservative) immersed boundary code with AMR capability for FSI problems.

Collaborator: W. Oates (FSU)

Low-Re compressible flows

This study is motivated by low-Re flight in Martian atmosphere where compressibility effects can play an important role.

Collaborator: K. Asai (Tohoku Univ)

Sponsors:

We are grateful for the support from AFOSR, AFRL, ARO, ONR, NSF, Ebara Corp, Honda R&D, Cummins, and FSU CRC.