Browsing Faculty of Arts and Sciences by Keyword "hydrodynamics"

Now showing items 1-20 of 23

    • Atmospheric Heat Redistribution and Collapse on Tidally Locked Rocky Planets 

      Wordsworth, Robin (IOP Publishing, 2015)
      Atmospheric collapse is likely to be of fundamental importance to tidally locked rocky exoplanets, but it remains understudied. Here, general results on the heat transport and stability of tidally locked terrestrial-type ...

    • Biomimetic shark skin: design, fabrication and hydrodynamic function 

      Wen, L; Weaver, James C.; Lauder, George V. (The Company of Biologists, 2014)
      Although the functional properties of shark skin have been of considerable interest to both biologists and engineers because of the complex hydrodynamic effects of surface roughness, no study to date has successfully ...

    • A Chandra Observation of 3C 288—Reheating ohe Cool Core of a 3 Kev Cluster from a Nuclear Outburst at Z = 0.246 

      Lal, D. V.; Kraft, Ralph P.; Forman, William R.; Hardcastle, M. J.; Jones, C.; Nulsen, Paul; Evans, D. A.; Croston, J. H.; Lee, Julia C (IOP Publishing, 2010)
      We present results from a 42 ks Chandra/ACIS-S observation of the transitional FR I/FR II radio galaxy 3C 288 at z = 0.246. We detect ~3 keV gas extending to a radius of ~0.5 Mpc with a 0.5-2.0 keV luminosity of 6.6 × 1043 ...

    • The Damping Rates of Embedded Oscillating Starless Cores 

      Broderick, Avery E.; Narayan, Ramesh; Keto, Eric; Lada, Charles J. (IOP Publishing, 2008)
      In a previous paper we demonstrated that nonradial hydrodynamic oscillations of a thermally supported (BonnorEbert) sphere embedded in a low-density, high-temperature medium persist for many periods. The predicted column ...

    • Discovery of Radio Afterglow from the Most Distant Cosmic Explosion 

      Chandra, Poonam; Frail, Dale A.; Fox, Derek; Kulkarni, Shrinivas; Berger, Edo; Cenko, S. Bradley; Bock, Douglas C.-J.; Harrsion, Fiona; Kasliwal, Mansi (IOP Publishing, 2010)
      We report the discovery of radio afterglow emission from the gamma-ray burst GRB 090423, which exploded at a redshift of 8.3, making it the object with the highest known redshift in the Universe. By combining our radio ...

    • Dispersal of fungal spores on a cooperatively generated wind 

      Roper, M.; Seminara, A.; Bandi, M. M.; Cobb, A.; Dillard, H. R.; Pringle, Anne E. (Proceedings of the National Academy of Sciences, 2010)
      Because of their microscopic size, the forcibly ejected spores of ascomycete fungi are quickly brought to rest by drag. Nonetheless some apothecial species, including the pathogen Sclerotinia sclerotiorum, disperse with ...

    • Escaping Flatland: three-dimensional kinematics and hydrodynamics of median fins in fishes 

      Tytell, E. D.; Standen, E. M.; Lauder, George V. (The Company of Biologists, 2008)
      Fish swimming has often been simplified into the motions of a two-dimensional slice through the horizontal midline, as though fishes live in a flat world devoid of a third dimension. While fish bodies do undulate primarily ...

    • Explosively launched spores of ascomycete fungi have drag-minimizing shapes 

      Roper, M.; Pepper, R. E.; Brenner, Michael P.; Pringle, Anne E. (Proceedings of the National Academy of Sciences, 2008)
      The forcibly launched spores of ascomycete fungi must eject through several millimeters of nearly still air surrounding fruiting bodies to reach dispersive air flows. Because of their microscopic size, spores experience ...

    • Fluid dynamics of feeding behaviour in white-spotted bamboo sharks 

      Nauwelaerts, S.; Wilga, Cheryl; Lauder, George V.; Sanford, C. P. (The Company of Biologists, 2008)
      Although the motor control of feeding is presumed to be generally conserved, some fishes are capable of modulating the feeding behaviour in response to prey type and or prey size. This led to the ʻfeeding modulation ...

    • Galactic Angular Momentum in the Illustris Simulation: Feedback and the Hubble Sequence 

      Genel, Shy; Fall, S. Michael; Hernquist, Lars Eric; Vogelsberger, Mark; Snyder, Gregory F.; Rodriguez-Gomez, Vicente; Sijacki, Debora; Springel, Volker (IOP Publishing, 2015)
      We study the stellar angular momentum of thousands of galaxies in the Illustris cosmological simulation, which captures gravitational and gas dynamics within galaxies, as well as feedback from stars and black holes. We ...

    • Hydrodynamic function of dorsal and anal fins in brook trout (Salvelinus fontinalis) 

      Standen, E. M.; Lauder, George V. (The Company of Biologists, 2007)
      Recent kinematic and hydrodynamic studies on fish median fins have shown that dorsal fins actively produce jets with large lateral forces. Because of the location of dorsal fins above the fish’s rolling axis, these lateral ...

    • Hydrodynamics of surface swimming in leopard frogs (Rana pipiens) 

      Johansson, L. C.; Lauder, George V. (The Company of Biologists, 2004)
      The kinematics of swimming frogs have been studied extensively in the past and, based on these results, hypotheses regarding the hydrodynamics of frog swimming can be generated. To test these hypotheses we used digital ...

    • Hydrodynamics of the bluegill sunfish C-start escape response: three-dimensional simulations and comparison with experimental data 

      Borazjani, I.; Sotiropoulos, F.; Tytell, E. D.; Lauder, George V. (The Company of Biologists, 2012)
      In this work we study the hydrodynamics of a bluegill sunfish performing a C-start maneuver in unprecedented detail using 3-D numerical simulations guided by previous laboratory experiments with live fish. The 3-D fish ...

    • Numerical Simulation of Hot Accretion Flows. III. Revisiting Wind Properties Using the Trajectory Approach 

      Yuan, Feng; Gan, Zhaoming; Narayan, Ramesh; Sadowski, Aleksander; Bu, Defu; Bai, Xue-Ning (IOP Publishing, 2015)
      Previous MHD simulations have shown that wind must exist in black hole hot accretion flows. In this paper, we continue our study by investigating the detailed properties of wind and the mechanism of wind production. For ...

    • Prompt Radiation and Mass Outflows From the Stream–stream Collisions of Tidal Disruption Events 

      Jiang, Yan-Fei; Guillochon, James F.; Loeb, Abraham (American Astronomical Society, 2016)
      Stream-stream collisions play an important role for the circularization of highly eccentric streams resulting from tidal disruption events (TDEs). We perform three dimensional radiation hydrodynamic simulations to show ...

    • Recoiling black holes: prospects for detection and implications of spin alignment 

      Blecha, Laura; Sijacki, Debora; Kelley, Luke Zoltan; Torrey, Paul; Vogelsberger, Mark; Nelson, Dylan; Springel, Volker; Snyder, Gregory; Hernquist, Lars Eric (Oxford University Press (OUP), 2015)
      Supermassive black hole (BH) mergers produce powerful gravitational wave emission. Asymmetry in this emission imparts a recoil kick to the merged BH, which can eject the BH from its host galaxy altogether. Recoiling BHs ...

    • Running on water: Three-dimensional force generation by basilisk lizards 

      Hsieh, S. T.; Lauder, George V. (Proceedings of the National Academy of Sciences, 2004)
      Water provides a unique challenge for legged locomotion because it readily yields to any applied force. Previous studies have shown that static stability during locomotion is possible only when the center of mass remains ...

    • The Shakura-Sunyaev viscosity prescription with variable (r) 

      Penna, R. F.; Sadowski, A.; Kulkarni, A. K.; Narayan, Ramesh (Oxford University Press (OUP), 2012)
      Almost all hydrodynamic accretion disc models parametrize viscosity with the dimensionless parameter α. There is no detailed model for α, so it is usually taken to be a constant. However, global simulations of magnetohydrodynamic ...

    • A Simplified Global Solution for an Advection‐dominated Accretion Flow 

      Yuan, Feng; Ma, Renyi; Narayan, Ramesh (IOP Publishing, 2008)
      When we model black hole accretion sources such as active galactic nuclei and black hole X-ray binaries as advection dominated accretion flows (ADAFs), it is necessary to use the global solution to the equations rather ...

    • Simulated Galaxy Interactions as Probes of Merger Spectral Energy Distributions 

      Lanz, Lauranne; Hayward, Christopher C.; Zezas, Andreas; Smith, Howard A.; Ashby, Matthew L N; Brassington, Nicola; Fazio, Giovanni Gene; Hernquist, Lars Eric (IOP Publishing, 2014)
      We present the first systematic comparison of ultraviolet-millimeter spectral energy distributions (SEDs) of observed and simulated interacting galaxies. Our sample is drawn from the Spitzer Interacting Galaxy Survey and ...