KEIKO K. NOMURA

Professor of Mechanical and Aerospace Engineering

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Contact Information

Department of Mechanical and Aerospace Engineering
University of California, San Diego
9500 Gilman Drive
La Jolla, CA 92093-0411

E-Mail: knomura@ucsd.edu
Office: 576 Engineering Building Unit II
Phone: (858) 534-5520
Fax: (858) 534-7599

Education


Research Areas

Theoretical and computational fluid mechanics, turbulence, vortex dynamics, transport phenomena, reacting flows and combustion, environmental flows.


Current Research Topics


Graduate Students


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Selected Publications

KEETON, B., CARPIO, J., NOMURA, K., SANCHEZ, A., WILLIAMS, F., A computational investigation of swirl-number and Damköhler-number effects on non-premixed laminar swirling jet flames, Combustion and Flame, Volume 258, Part 2, https\://doi.org/10.1016/j.combustflame.2023.113075 (2023).

FOLZ, P. J., NOMURA, K. K., On asymmetric vortex pair interactions in shear Journal of Fluid Mechanics. 969:A21. doi:10.1017/jfm.2023.525 (2023).

KEETON, B., CARPIO, J., NOMURA, K., SANCHEZ, A., WILLIAMS, F., Vortex breakdown in swirling jet Burke-Schumann flames, Proceedings of the Combustion Institute, Volume 39, Issue 2, 1635-1645 https://doi.org/10.1016/j.proci.2022.07.013 (2023).

KEETON, B., CARPIO, J., NOMURA, K., SANCHEZ, A., WILLIAMS, F., Vortex breakdown in variable-density gaseous swirling jets, J. Fluid Mech. 936 (2022).

WEEKES, R., NOMURA, K., SANCHEZ, A., WILLIAMS, F., A three-step reduced mechanism for MILD combustion, Combustion Science and Technology, DOI: 10.1080/00102202.2022.2041620 (2022).

FOLZ, P. J., NOMURA, K. K., A quantitative assessment of viscous asymmetric vortex pair interactions, J. Fluid Mech. 829, 1-30 (2017).

FOLZ, P. J., NOMURA, K. K., Interaction of two equal co-rotating viscous vortices in the presence of background shear, , Fluid Dyn Res, 46, 031423 (2014).

BRANDT, L. K., NOMURA, K. K., Characterization of the interactions of two unequal co-rotating vortices, , J. Fluid Mech. 646, 233-253 (2010).

BRANDT, L. K., CICHOCKI, T. K., NOMURA, K. K., Asymmetric vortex merger: mechanism and criterion, Theor. Comput. Fluid Dyn, 24, 163-167 (2010).

STRETCH, D.D., ROTTMAN, J. W., VENAYAGAMOORTHY, S. K., NOMURA, K. K., REHMANN, C. R., Mixing efficiency in decaying stably stratified turbulence, Dynamics of Atmospheres and Oceans, 49, 25–36 (2010).

VANDERHOFF, J. C., NOMURA, K. K., ROTTMAN, J. W., MACASKILL, C., Doppler spreading of internal gravity waves by an inertia-wave packet , J. Geophys. Res., 113, 1-14 (2008).

BRANDT, L. K. & NOMURA, K. K., The physics of vortex merger and the effects of ambient stable stratification , J. Fluid Mech. 592, 413-446 (2007).

FYRILLAS, M. M. & NOMURA, K. K., Diffusion and Brownian motion in Lagrangian coordinates , J. Chem. Phys. Vol 126, 16, 1-9 (2007).

BRANDT, L. K. & NOMURA, K. K., The physics of vortex merger: further insight , Phys. Fluids 18 (2006).

NOMURA, K. K., TSUTSUI, H., MAHONEY, D., ROTTMAN, J. W., Short-wavelength instability and decay of a vortex pair in a stratified fluid , J. Fluid Mech. 553, 283-322 (2006).

DIAMESSIS, P. J. & NOMURA, K. K., The structure and dynamics of overturns in stably stratified homogeneous turbulence , J. Fluid Mech. 499, 197-229 (2004).

DIAMESSIS, P. J., KERNEY, W. R., BADEN, S. B., NOMURA, K. K., Automated tracking of 3D overturn patches in direct numerical simulations of stratified turbulence , In Lecture Notes in Computer Science, No. 2367, Applied Parallel Computing, 6th Intl Conf, PARA'02, Helsinki, Finland, Springer-Verlag, Berlin (2002) (abstract).

NOMURA, K. K., Geometric aspects of the interaction of vorticity and strain in homogeneous sheared turbulence, Proceedings of the IUTAM Symposium on Geometry and Statistics of Turbulence, (eds. T. Kambe, T. Nakano and T. Miyauchi) Kluwer Academic Publishers (2001).

DIAMESSIS, P. J. & NOMURA, K. K., Interaction of vorticity, rate of strain, and scalar gradient in stratified homogeneous sheared turbulence , Phys. Fluids 12, 1166-1188 (2000).

NOMURA, K. K. & DIAMESSIS, P. J., The interaction of vorticity and rate of strain in homogeneous sheared turbulence , Phys. Fluids 12, 846-864 (2000).

GRIMMETT, T. K. & NOMURA, K. K., Differential diffusion effects in a turbulent nonpremixed flame, FEDSM99-7768, Proceedings of the 3rd ASME/JSME Joint Fluids Engineering Conference, San Francisco, California (1999).

NOMURA, K. K. & POST, G. K., The structure and dynamics of vorticity and rate of strain in incompressible homogeneous turbulence , J. Fluid Mech. 377, 65-97 (1998).

NOMURA, K. K. & ELGHOBASHI, S., The structure of inhomogeneous turbulence in variable density nonpremixed flames , Theoret. Comput. Fluid Dynamics 5, 153-175 (1993).

NOMURA, K. K. & ELGHOBASHI, S. E., Mixing characteristics of an inhomogeneous scalar in isotropic and homogeneous sheared turbulence , Phys. Fluids A 4, 606-625 (1992).


Recent Conference Presentations

KEETON, B., NOMURA, K., Numerical simulations of coaxial swirling jets and flames, APS Meeting of the Division of Fluid Dynamics, Washington, DC, 2023.

KEETON, B., NOMURA, K., SANCHEZ, A., WILLIAMS, F., Vortex breakdown in swirling Burke- Schumann flames. 39th International Symposium on Combustion, Vancouver, Canada, 2022.

KEETON, B., CARPIO, J., NOMURA, K., SANCHEZ, A., WILLIAMS, F., Vortex breakdown in non-isothermal gaseous swirling jets, APS Meeting of the Division of Fluid Dynamics, Phoenix, Arizona, 2021.

WEEKES, R., NOMURA, K., Topology of a swirling jet and vortex breakdown, APS Meeting of the Division of Fluid Dynamics, Chicago, Illinois, 2020.

CARLSON, S., FOLZ, P., NOMURA, K., Reynolds number effects on vortex merging criterion, APS Meeting of the Division of Fluid Dynamics, Chicago, Illinois, 2020.

STUMPS, D., NOMURA, K., Elliptical instability in asymmetric vortex pairs APS Meeting of the Division of Fluid Dynamics, Chicago, Illinois, 2020.

CARLSON, S., FOLZ, P., NOMURA, K., Vortex Interactions in Two-Dimensional Turbulence, APS Meeting of the Division of Fluid Dynamics, Atlanta, Georgia, 2018.

FOLZ, P., NOMURA, K., The influence of background shear on asymmetric vortex interactions, APS Meeting of the Division of Fluid Dynamics, Denver, Colorado, 2017.

FOLZ, P., NOMURA, K., A quantitative assessment of asymmetric vortex interactions in viscous flow, APS Meeting of the Division of Fluid Dynamics, Boston, Massachusetts, 2015.

FOLZ, P., NOMURA, K., Interaction regimes of unequal viscous vortex pairs in the presence of background shear, APS Meeting of the Division of Fluid Dynamics, San Francisco, California, 2014.

FOLZ, P., NOMURA, K., Interactions of two unequal co-rotating vortices in the presence of external shear, APS Meeting of the Division of Fluid Dynamics, San Diego, California, 2012.

JO, S., NOMURA, K., ROTTMAN, J., The energetics of stably stratified turbulence in the Boussinesq approximation, APS Meeting of the Division of Fluid Dynamics, Baltimore, Maryland, 2011.

JO, S., NOMURA, K., ROTTMAN, J., Energetics of vertical fluid particle dispersion in stably stratified turbulence, Seventh International Symposium on Stratified Flows, Rome, Italy, 2011.

JO, S., NOMURA, K., ROTTMAN, J., Energetics of vertical fluid particle dispersion in stably stratified turbulence, APS Meeting of the Division of Fluid Dynamics, Minneapolis, Minnesota, 2009.

NOMURA, K. K., BRANDT, L. K., Characterization of the interaction of two unequal co-rotating vortices, APS Meeting of the Division of Fluid Dynamics, San Antonio, Texas, 2008.

NOMURA, K. K., BRANDT, L. K., Asymmetric vortex merger: mechanism and criterion, IUTAM Symposium "150 Years of Vortex Dynamics", Lyngby, Denmark, 2008.

BRANDT, L. K., NOMURA, K. K., Viscous interactions of asymmetric co-rotating vortex pairs, APS Meeting of the Division of Fluid Dynamics, Salt Lake City, Utah. 2007.

BRANDT, L. K., NOMURA, K. K., Vortex merger in stably stratified fluid, Sixth International Symposium on Stratified Flows, Perth, Australia, 2006.

NOMURA, K., PHAM, L., ROTTMAN, J., Mixing and dispersion in stably stratified sheared turbulence, APS Meeting of the Division of Fluid Dynamics, Tampa Bay, Florida. 2006.

BRANDT, L., NOMURA, K., Vortex merging in stably stratified fluid, APS Meeting of the Division of Fluid Dynamics, Tampa Bay, Florida. 2006.

VANDERHOFF, J., ROTTMAN, J., NOMURA, K., Scattering of small-scale internal waves by near-inertial wavepackets in the ocean, APS Meeting of the Division of Fluid Dynamics, Tampa Bay, Florida. 2006.

BRANDT, L., NOMURA, K., Vortex merging in stably stratified fluid, APS Meeting of the Division of Fluid Dynamics, Chicago, Illinois. 2005.

NOMURA, K., BRANDT, L., ROTTMAN, J., Effects of stable stratification on the elliptic instability in vortex pairs, APS Meeting of the Division of Fluid Dynamics, Chicago, Illinois. 2005.

VANDERHOFF, J., ROTTMAN, J., NOMURA, K., Doppler spreading of internal gravity waves in the ocean, APS Meeting of the Division of Fluid Dynamics, Chicago, Illinois. 2005.

NOMURA, K., BRANDT, L., Effects of stable stratification on vortex pair dynamics, GTP Workshop on Coherent Structures in Atmosphere and Ocean at NCAR, July 2005, Boulder, Colorado.

PHAM, L., NOMURA, K., ROTTMAN, J., Turbulent dispersion in stably stratified homogeneous shear flow, APS Meeting of the Division of Fluid Dynamics, Seattle, Washington. 2004.

NOMURA, K.K., TSUTSUI, H., MAHONEY, D., CROCKETT, J., ROTTMAN, J.W., Evolution of a counter-rotating vortex Pair in a stably stratified fluid, Third International Symposium on Turbulence and Shear Flow Phenomena, Sendai, Japan. 2003.

NOMURA, K., MAHONEY, D., TSUTSUI, H., CROCKETT, J., ROTTMAN, J., Effects of stable stratification on the short wave instability in a vortex pair, APS Meeting of the Division of Fluid Dynamics, Dallas, Texas. 2002.

VENAYAGAMOORTHY, S., STRETCH, D., ROTTMAN, J., NOMURA, K., Mixing efficiency of turbulence in environmental flows, Proceedings of the 1st International Conference on Heat Transfer, Fluid Mechanics, and Thermodynamics, Kruger Park, South Africa 8--10 April 2002.


Professional Distinctions


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