Physics of Scalar Transport, Mixing and Reactions
We are interested in how structured flows influence the stirring and mixing of ecologically relevant entities. This line of research has led to new insights on the mechanisms by which turbulence enhances mixing and reactions, and how organisms have adapted to opportunities and constraints imposed by turbulent physics.
Pratt, K.R., True, A. and J.P. Crimaldi. Turbulent Clustering of Initially Well-mixed Buoyant Particles on a Free-surface by Lagrangian Coherent Structures. Physics of Fluids 29, no. 7, 2017. PDF
Soltys, M A, and J.P. Crimaldi. Joint Probabilities and Mixing of Isolated Scalars Emitted From Parallel Jets. Journal of Fluid Mechanics 769, 130-153, 2015. PDF
Pratt, K.R., Meiss, J.D. and J.P. Crimaldi. Reaction Enhancement of Initially Distant Scalars by Lagrangian Coherent Structures. Physics of Fluids 27, no. 3, 035106, 2015. PDF
Crimaldi, J.P. and T.R. Kawakami. Reaction of initially distant scalars in a cylinder wake. Physics of Fluids 25, 053604, 1-16, 2013. PDF
Odor Plumes and Animal Navigation
Aquatic and terrestrial animals are adept at using odor plumes as navigational cues in their search for food and mates, and to avoid predators. We have developed laser-based laboratory techniques for creating and quantifying odor plumes in the laboratory. The resulting datasets serve as virtual odor landscapes for studying and testing bio-inspired odor search algorithms.
Connor, E.G., McHugh, M.K. and J.P. Crimaldi. Quantification of airborne odor plumes using planar laser-induced fluorescence. Experiments in Fluids, In Review. PDF
Hydrodynamics of Ecological Flows
We use experimental and numerical approaches to study hydrodynamic flow phenomena associated with a range of ecological processes.
True, A.C. and J.P. Crimaldi. Hydrodynamics of Viscous Inhalant Flows. Physical Review E 95, no. 5, 2017. PDF
Crimaldi, J.P. and T.R. Kawakami. Reaction enhancement in an unsteady obstacle wake: Implications for broadcast spawning and other mixing-limited processes in marine environments. Journal of Marine Systems 114,130-137, 2015. PDF
Bell, A.F. and J.P. Crimaldi. Effect of steady and unsteady shear on chemoattractant plume formation around an egg: implications for rates of fertilization for motile sperm. Journal of Marine Systems 148, 236-248, 2015. PDF
Crimaldi, J.P. and R.A. Zimmer. The physics of broadcast spawning in benthic invertebrates. Annual Review of Marine Science 6, 141-165, 2014. PDF
Engineered Mixing in Porous Media
As part of a collaborative study on engineered approaches to enhance the efficacy of contaminated groundwater remediation, we have developed laser-based laboratory techniques for studying engineered injections and extractions in ground water plumes.