The Lab
Principal Investigator
Principal Investigator
Assistant Professor of Mechanical Engineering – Cleveland State University
Dr. Usta earned his bachelor’s degree from Yildiz Technical University (Turkey) in 2012, and master’s and Ph.D. degrees from Lehigh University in 2016 and 2018 respectively, all in mechanical engineering. He was previously a Postdoctoral Fellow and Research Faculty in the Department of Mechanical Engineering at Georgia Institute of Technology. He joined the Department of Mechanical Engineering at Cleveland State University as an Assistant Professor in 2022 and has been an Affiliate Faculty in the Departments of Chemical and Biomedical Engineering since 2023.
Dr. Usta directs the Complex Flows and Advanced Transport Lab. His research develops the transport physics of flow-responsive systems – where flow actively reorganizes the medium through which it moves – spanning biological flows, turbulent mixing, membrane separation, and reactive surfaces. Working at disciplinary intersections by design, his group combines high-fidelity computation and scientific machine learning to build the physical frameworks governing how flow history shapes macromolecular activation, cellular damage, surface-mediated separation, and mixing in complex environments ranging from physiological to high-speed compressible flows. His research is supported by the Department of Energy and draws on experimental collaborators across biomedical engineering, materials science, national laboratories, and industry partners.
Current Members
Ph.D. Student
Sruthi Chengalrayan
Aug 2023 – present
vWF – extracellular vesicle interactions under hemodynamic conditions
Thrust I – Bioflow & Hemodynamics

Ph.D. Student
Saugat Upreti
Aug 2023 – present
Data-driven models for flow-history-dependent vWF activation
Thrust I – Bioflow & Hemodynamics
Ph.D. Student
Mertcan Samgar
Jan 2023 – present
Hydrodynamics and separation characterization of centrifugal reverse osmosis
Thrust II – Flow-Coupled Functional Surfaces
M.S. Student
Marijo Vukancic
May 2025 – present
Viscosity-gradient effects in compressible jet mixing flows
Shared Foundation – Variable-Property Turbulence
M.S. Student
Syed Umair Ahmed
Jan 2025 – present
Red blood cell and cellular deformation in shear and extensional flows
Thrust I – Bioflow & Hemodynamics
M.S. Student
Brandon Tsirlin
Apr 2026 – present
Compressible mixing and separation
Shared Foundation – Variable-Property Turbulence
Alumni
Research Interns
The lab welcomes high school students for research internships. Current and past participants are listed below.