Effect of expansion and magnetic field configuration on mass entrainment of jets |
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| Institution: | 1. College of Civil Engineering and Architecture, Guangxi University, 100 East Daxue Road, Nanning, Guangxi 530004, China;2. Key Laboratory of Western China''s Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China;3. Research Center for Arid and Desert, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China;1. Faculdade de Ciências Médicas da Santa Casa de São Paulo, Departamento de Pediatria, Unidade de Endocrinologia Pediátrica e Ambulatório de Diabetes Pediátrico, São Paulo, SP, Brasil;2. Faculdade de Ciências Médicas da Santa Casa de São Paulo, Departamento de Pediatria, Unidade de Infectologia Pediátrica, São Paulo, SP, Brasil;3. Faculdade de Ciências Médicas da Santa Casa de São Paulo, Departamento de Pediatria, Ambulatório de Diabetes Pediátrico, São Paulo, SP, Brasil;1. Graduate School of Engineering, Hokkaido University, North 13, West 8, Kita-ku, Sapporo 060-8628, Japan;2. School of Nuclear Engineering, Purdue University, 400 Central Dr., West Lafayette, IN 47907-2017, USA;1. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China;2. Electric Power Research Institute of State Grid Shandong Electric Power Company, Jinan, Shandong, 250000, China;1. Vanderbilt Memory and Alzheimer''s Center, Vanderbilt University Medical Center, Nashville, TN, USA;2. Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA;3. Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA;4. Center for Translational & Computational Neuroimmunology, Department of Neurology, Columbia University Medical Center, New York, NY, USA;5. Cell Circuits Program, Broad Institute, Cambridge MA, USA;6. Department of Radiology, Stanford Hospital, Stanford, CA, USA;7. Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA;8. Department of Chemistry, Vanderbilt University, Nashville, TN, USA;9. Rush Alzheimer''s Disease Center, Rush University Medical Center, Chicago, IL, USA |
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| Abstract: | We investigate the growth of jet plus entrained mass in simulations of supermagnetosonic cylindrical and expanding jets. The entrained mass spatially grows in three stages: from an initially slow spatial rate to a faster rate and finally at a flatter rate. These stages roughly coincide with the similar rates of expansion in simulated radio intensity maps, and also appear related to the growth of the Kelvin–Helmholtz instability through linear, nonlinear, and saturated regimes. In the supermagnetosonic cylindrical jets, we found that a jet with an embedded primarily toroidal magnetic field is more stable than a jet with a primarily axial magnetic field. Also, pressure-matched expanding jets are more stable and entrain less mass than cylindrical jets with equivalent inlet conditions. We investigate the growth of jet plus entrained mass in simulations of supermagnetosonic cylindrical and expanding jets. The entrained mass spatially grows in three stages: from an initially slow spatial rate to a faster rate and finally at a flatter rate. These stages roughly coincide with the similar rates of expansion in simulated radio intensity maps, and also appear related to the growth of the Kelvin–Helmholtz instability through linear, nonlinear, and saturated regimes. In the supermagnetosonic cylindrical jets, we found that a jet with an embedded primarily toroidal magnetic field is more stable than a jet with a primarily axial magnetic field. Also, pressure-matched expanding jets are more stable and entrain less mass than cylindrical jets with equivalent inlet conditions. |
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