Jason M. Ortega

Portrait of Jason M. Ortega

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Email
ortega17@llnl.gov
Phone
(925) 423-3824
Organization
Not Available

Biography Education Publications Awards

Expertise and Research Interests

Experimental and computational fluid dynamics (CFD). Extensive experience in particle image velocimetry (PIV), wind tunnel measurements (full- and model-scale vehicles), towing tank measurements, in vitro measurements of hemodynamic flows, CFD code validation, data analysis, and computational model development. Research interests include vortex dynamics and instability, bio-fluid dynamics, heavy vehicle aerodynamics, porous media flows, high-speed compressible flows, and medical device research and design.

Professional Memberships

American Physical Society, Division of Fluid Dynamics, Member
American Institute of Aeronautics and Astronautics, Member

Ph.D., U.C. Berkeley, Mechanical Engineering, 2000

M.S., U.C. Berkeley, Mechanical Engineering, 1998

B.S., U.C. Berkeley, Mechanical Engineering, 1995

Bristol, R.L., Ortega, J.M., & Savas Ö. 1999 A towing tank study of airfoil wake vortices at Re of order 10⁵, AIAA Paper 99-3419.

Ortega, J.M. & Savas, Ö. 2001 A rapidly growing instability mode in trailing multiple-vortex wakes, AIAA J., 39, 750-754.

Ortega, J.M., Bristol, R. L. & Savas, Ö. 2002 Wake alleviation properties of triangular-flapped wings, AIAA J., 40, 709-721.

Ortega, J.M., Dunn, T., McCallen, R.C., & Salari, K. 2002 A computational study of a truncated trailer geometry, The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, United Engineering Foundation, Monterey-Pacific Grove, California.

Ortega, J.M., Bristol, R.L. & Savas, Ö. 2003 Experimental study of the instability of unequal strength counter-rotating vortex pairs, J. Fluid Mech., 474:35-84.

Bristol, R.L., Ortega, J.M. & Savas, Ö. 2003 Experimental study of co-rotating wake vortex merger at Re of O(10⁵), AIAA J., 41:741-744.

Bristol, R.L., Ortega, J.M., Marcus, P.S., & Savas, Ö. 2004 On cooperative instabilities of parallel vortex pairs, J. Fluid Mech., 517:331-358.

Wheeler, E. K., Benett, W., Stratton, P., Richards, J., Chen, A., Christian, A., Ness, K.D., Ortega, J., Li, L.G., Weisgraber, T.H., Goodson, K., & Milanovich, F. 2004 Convectively driven polymerase chain reaction thermal cycler, Analytical Chemistry, 76(14):4011-4016.

Ortega, J.M. & Salari, K. 2004 An experimental study of drag reduction devices for a trailer underbody and base, AIAA Paper 2004-2252.

Salari, K., Ortega, J., & Castellucci, P. 2004 Computational prediction of aerodynamic forces for a simplified integrated tractor-trailer geometry, AIAA Paper 2004-2253.

Tsai, W., Savas, Ö., Maitland, D., Ortega, J., Small, W., Wilson, T., & Saloner, D. 2006 Experimental study of the vascular dynamics of a saccular basilar aneurysm, IMECE2006-14662, Proceedings of IMECE 2006 ASME International Mechanical Engineering Congress and Exposition November 5-10, Chicago, Illinois, USA.

Ortega, J.M., Small, W., Wilson, T.S., Benett, W.J., Loge, J.M., & Maitland, D.J. 2007 A shape memory polymer dialysis needle adapter for the reduction of hemodynamic stress within arteriovenous grafts, IEEE Trans. Biomed. Eng., 54(9):1722-4.

Maitland, D.J., Small, W., Ortega, J.M., Buckley, P.R., Rodriguez, J., Hartman, J., & Wilson, T.S. 2007 Prototype laser-activated shape memory polymer foam device for embolic treatment of aneurysms, Journal of Biomedical Optics, 12(3):1-3.

Ortega, J., Salari, K., & Storms, B. 2007 Investigation of tractor base bleeding for heavy vehicle aerodynamic drag reduction, The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains II, Tahoe City, California, August 26-31.

Ortega, J., Maitland, D., Wilson, T., Tsai, W., Savas, Ö., & Saloner, D. 2007 Vascular dynamics of a shape memory polymer foam aneurysm treatment technique, Annals of Biomedical Engineering, 35(11):1870-1884.

Ortega, J., Hartman, J., Rodriguez, J., & Maitland, D. 2008 Post-treatment hemodynamics of a basilar aneurysm and bifurcation, Annals of Biomedical Engineering, 36(9):1531-1546.

Ortega, J.M. & Salari, K. 2008 Investigation of a trailer underbody fairing for heavy vehicle aerodynamic drag reduction, 08CV-0026, SAE Commercial Vehicle Engineering Congress and Exhibition, October 7-9, Rosemont, Illinois, USA.

Salari, K. & Ortega, J. 2010 Tractor-trailer truck aerodynamics, McGraw-Hill Yearbook of Science & Technology, 390–392.

Ortega, J. M. 2011 Non-lethal blast wave interactions with a human head, Computers & Fluids, 52:92–103

Ortega, J., Salari, K., Brown, A., & Schoon, R. 2011 Aerodynamic drag reduction of class 8 heavy vehicles: a full-scale wind tunnel test, LLNL Technical Report, LLNL-JRNL-558413.

Ortega, J.M., Hartman, J., Rodriguez, J.N., & Maitland, D.J. 2013 Virtual treatment of basilar aneurysms using shape memory polymer foam, Annals of Biomedical Engineering, 41(4):725–743.

Ortega, J.M. 2013 A Porous media model for blood flow within reticulated foam, Chemical Engineering Science, 99:59–66.

Muschenborn, A.D., Ortega, J.M., Szafron, J.M., & Maitland, D.J. 2013 Porous media properties of reticulated shape memory polymer foams and mock embolic coils for aneurysm treatment, BioMedical Engineering OnLine, 12:103.

Lewicki, J.P., Rodriguez, J.N., Zhu, C., Worsley, M.A., Wu, A.S., Kanarska, Y., Horn, J.D., Duoss, E.B., Ortega, J.M., Elmer, W., Hensleigh, R., Fellini, R.A., & King, M.J. 2017 3D-printing of meso-structurally ordered carbon fiber/polymer composites with unprecedented orthotropic physical properties, Sci. Rep. 7, 43401; doi: 10.1038/srep43401.

Salari, K. & Ortega, J.M. 2018 Experimental investigation of the aerodynamic benefits of truck platooning, Society of Automotive Engineers World Congress Experience, April 10-12, Detroit, Michigan.

Horn, J.D., Maitland, D.J., Hartman, J., & Ortega, J.M. 2018 A computational thrombus formation model: application to an idealized two-dimensional aneurysm treated with bare metal coils, Biomech Model Mechanobiol., 17(6):1821-1838.

Ortega, J.M., Golobic, M., Sain, J.D., Lenhardt, J.M., Wu, A.S., Fisher, S.E., Perez Perez, L.X., Jaycox, A.W., Smay, J.E., Duoss, E.B., & Wilson, T.S. 2019 Active mixing of disparate inks for multi-material 3D printing, Advanced Materials Technologies, https://doi.org/10.1002/admt.201800717

Golobic, A.M., Durban, M.D., Fisher, S.E., Grapes, M.D., Ortega, J.M., Spadaccini, C.M., Duoss, E.B., Gash, A.E., & Sullivan, K.T. 2019 Active mixing of reactive materials for 3D printing, Advanced Engineering Materials, https://doi.org/10.1002/adem.201900147.

Horn, J.D., Maitland, D.J., Hartman, J., & Ortega, J.M. 2019 Computational study of clot formation in aneurysms treated with shape memory polymer foam, Medical Engineering & Physics, https://doi.org/10.1016/j.medengphy.2019.10.002.

Jang, L.K., Alvarado, J.A., Pepona, M., Wasson, E.M., Nash, L.D., Ortega, J.M., Randles, A., Maitland, D.J., Moya, M.L., & Hynes, W.F. 2020 Three-dimensional bioprinting of aneurysm-bearing tissue structure for endovascular deployment of embolization coils, Biofabrication, https://iopscience.iop.org/article/10.1088/1758-5090/abbb9b.

Dylla-Spears, R., Yee, T.D., Sasan, K. , Nguyen, D.T., Dudukovic, N.A., Ortega, J.M., Johnson, M.A., Herrera, O.D., Ryerson, F.J., Wong, L.L. 2020 3D printed gradient index glass optics. Sci. Adv. 6(47), https://www.science.org/doi/10.1126/sciadv.abc7429.

Ortega, J.M. & Salari, K. 2021 Experimental investigation of the aerodynamic benefits of truck platooning: two- and four-vehicle platoons, SAE Technical Paper 2021-01-0942, https://doi.org/10.4271/2021-01-0942.

Salari, K. & Ortega, J.M. 2021 Aerodynamic integration produces a vehicle shape with a negative drag coefficient, PNAS, 118(27), https://doi.org/10.1073/pnas.2106406118.

Jason M. Ortega

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