Now showing items 86-105 of 136

    • Oscillating foils of high propulsive efficiency 

      Anderson, J. M.; Streitlien, K.; Barrett, D.S.; Triantafyllou, M.S. (Cambridge University Press, 1998)
      Thrust-producing harmonically oscillating foils are studied through force and power measurements, as well as visualization data, to classify the principal characteristics of the flow around and in the wake of the foil. ...
    • Post critical heat transfer to flowing liquid in a vertical tube 

      Plummer, David N. (Cambridge, Mass. : Heat Transfer Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 1974, 1974)
    • A Practical Integration of Automatic Generation Control and Demand Response 

      Shiltz, Dylan; Annaswamy, Anuradha (2015-10-16)
      For a power grid to operate properly, electrical frequency must be continuously maintained close to its nominal value. Increasing penetration of distributed generation, such as solar and wind generation, introduces ...
    • The prediction of low quality boiling voids 

      Griffith, P. (Cambridge, Mass. : M.I.T. Division of Sponsored Research, [1963], 1963)
      Slug flow theory is used to predict the density in heated channels of various shapes. In order to make this calculation possible, measurements are made of the bubble rise velocity in annuli, tube bundles, and channels. It ...
    • The Prediction of multiple heated channel flow patterns from single channel pressure drop data 

      Eselgroth, Peter Ward; Griffith, P. (Cambridge, Mass. : M.I.T. Dept. of Mechanical Engineering [1968], 1968)
      Pressure drop and burnout data taken on a single tube apparatus using Freon at one atmosphere has been used to predict the flow patterns, burnout and points at which flow reverses in a five tube array. All the behavior ...
    • Pressure Dependence of the Infrared Laser Lines in Barium Vapor 

      Madigan, M.; Hocker, L.O.; Flint, J.H.; Dewey, C.F. Jr (Institute of Electrical and Electronic Engineers, 1980)
      We have studied nine laser transitions in Ba vapor at wavelengths between 1.13 and 3.05 micrometer. Three of these laser lines have not been reported previously. The relative intensities of the four strongest transitions ...
    • Pressure drop with surface boiling in small-diameter tubes 

      Dr̲mer, Thomas; Bergles A. E. (Cambridge, Mass. : M.I.T. Dept. of Mechanical Engineering, [1964, 1964)
      Pressure drop for water flowing in small-diameter tubes under isothermal, nonboiling, and surface-boiling conditions was investigated. Experimental results for local pressure gradient and heattransfer coefficients are ...
    • Real Time Estimation of Ship Motions Using Kalman Filtering Techniques 

      Triantafyllou, Michael S.; Bodson, Marc; Athans, Michael (Institute of Electrical and Electronic Engineers, 1983)
      The estimation of the heave, pitch, roll, sway, and yaw motions of a DD-963 destroyer is studied, using Kalman filtering techniques, for application in VTOL aircraft landing. The governing equations are obtained from ...
    • Refrigerant forced-convection condensation inside horizontal tubes 

      Bae, Soonhoon; Maulbetsch, John S.; Rohsenow, Warren M. (Cambridge, Mass. : M.I.T. Heat Transfer Laboratory, [1968], 1968)
      Condensing heat transfer rates inside a horizontal tube were investigated -for large quality changes across the tube. The proposed correlation is a modification of the work of Rohsenow, Webber and Ling [29]. The result of ...
    • Refrigerant forced-convection condensation inside horizontal tubes 

      Bae, Soonhoon; Maulbetsch, John S.; Rohsenow, Warren M. (Cambridge, Mass. : M.I.T. Heat Transfer Laboratory, [1969], 1969)
      High vapor velocity condensation inside a tube was studied theoretically. The heat transfer coefficients were calculated by the momentum and heat transfer analogy. The Von Karman universal velocity distribution was applied ...
    • Refrigerant forced-convection condensation inside horizontal tubes 

      Bae, Soonhoon; Maulbetsch, John S.; Rohsenow, Warren M. (Cambridge, Mass. : M.I.T. Heat Transfer Laboratory, [1970], 1970)
      High vapor velocity condensation inside a tube was studied theoretically. The heat transfer coefficients were calculated by the momentum and heat transfer analogy. The Von Karman universal velocity distribution was applied ...
    • Regulation of Adenine Nucleotide Concentration at Endothelium-Fluid Interface by Viscous Shear Flow 

      Shen, Jian; Gimbrone, Michael A. Jr.; Luscinskas, Francis W.; Dewey, C. Forbes Jr. (Biophysical Society, 1993)
      The action of adenine nucleotides on vascular endothelial cells is apparently mediated by the local flow conditions. Because nucleotides are sequentially degraded from ATP - ADP - AMP -- adenosine by ecto-enzymes at the ...
    • Review of Experimental Work in Biomimetic Foils 

      Triantafyllou, Michael S.; Techet, Alexandra H.; Hover, Franz S. (Institute of Electrical and Electronic Engineers, 2004-07)
      Significant progress has been made in understanding some of the basic mechanisms of force production and flow manipulation in oscillating foils for underwater use. Biomimetic observations, however, show that there is a ...
    • Robust Control For Underwater Vehicle Systems With Time Delays 

      Triantafyllou, Michael S .; Grosenbaugh, Mark A. (Institute of Electrical and Electronic Engineers, 1991)
      Presented in this paper is a robust control scheme for controlling systems with time delays. The scheme is based on the Smith controller and the LQG/LTR (Linear Quadratic Gaussian/Loop Transfer Recovery) methodology. ...
    • The role of surface conditions in nucleate boiling 

      Griffith, P.; Wallis, John D. (Cambridge, Mass. : Massachusetts Institute of Technology, Division of Industrial Cooperation, [1958], 1958)
      Nucleation from a single cavity has been stuied indicating that cavity gemtry is aportant in two ways. The mouth diameter determines the superheat nmeded to initiate boiling and its shape determines its stability one boiling ...
    • Sequential Loop Closure Based Adaptive Autopilot Design for a Hypersonic Vehicle 

      Wiese, Daniel P.; Annaswamy, Anuradha M.; Muse, Jonathan A.; Bolender, Michael A.; Lavretsky, Eugene (2016-03-09)
      This paper presents a sequential loop closure approach to designing a velocity and altitude tracking au- topilot for a hypersonic vehicle. The control architecture consists of two decoupled control subsystems, one for ...
    • Simultaneous Measurements of Actin Filament Turnover, Filament Fraction, and Monomer Diffusion in Endothelial Cells 

      McGrath, J. L.; Tardy, Y.; Dewey, C. F. Jr; Meister, J. J.; Hartwig, J. H. (Biophysical Society, 1998-09)
      The analogous techniques of photoactivation of fluorescence (PAF) and fluorescence recovery after photobleaching (FRAP) have been applied previously to the study of actin dynamics in living cells. Traditionally, ...
    • Slug flow 

      Griffith, P.; Wallis, Graham B. (Cambridge, Mass. : Division of Sponsored Research, Massachusetts Institute of Technology, [1959], 1959)
      Introduction: When two phases flow concurrently in a pipe, they can distribute themselves in a number of different configurations. The gas could be uniformly dispersed throughout the liquid in the form of small bubbles. ...
    • Some hydrodynamic characteristics of bubbly mixtures flowing vertically upward in tubes 

      Rose, Sewell C.; Griffith, P. (Cambridge, Mass. : M.I.T. Division of Sponsored Research, [1964], 1964)
      An investigation of bubbly flow has been conducted in vertical plexiglass tubes using air and water at atmospheric pressure. The bubbly flow pattern is an entrance condition or a non-fully developed flow. A spontaneous ...
    • Squaring-Up Method for Relative Degree Two Plants 

      Qu, Zheng; Annaswamy, Anuradha; Lavretsky, Eugene (2015-09-28)
      Abstract--- Non-square multi-input-multi-output (MIMO) plants are becoming increasingly common, as the addition of multiple sensors is becoming prevalent. However, square systems are needed sometimes as an leverage when ...