TURBULENCE IN THE PRESENCE OF A VERTICAL BODY FORCE AND TEMPERATURE GRADIENT
Effect on turbulence of buoyancy caused by vertical body force and temperature gradient
BUOYANCY↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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The influence of gravitational body force in meteoritic chondrule and lunar glass formation
The effects of gravitational body force must be considered in the formation of extraterrestrial materials such as meteoritic chondrules and lunar glasses. Solidification experiments conducted in microgravity as well as g values greater than Earth's gravitational force have demonstrated that gravitational force can have profound and sometimes unexpected effects upon the way materials solidify and, therefore, upon their physical and mechanical properties. Solutal, thermal and sedimentation effects differ from those experienced on Earth. Because buoyancy forces are reduced, materials of different densities may remain in close proximity. The spherical morphology of chondrules and many lunar glasses may reflect the tendency for free floating liquids to form spherical droplets in a microgravity environment, a form which minimizes surface energy. Under these conditions, surface energy forces dominate gravity forces. The formation of two common chondrule textures, barred and radiating chondrules, can be explained using observations from glass science.
Budka, P. Z.↗
Turbofan flowfield simulation using Euler equations with body forces
A method for flow computations around ducted propfans is presented. The approach is to use the body force terms in the three-dimensional Euler equations to model the propeller. Numerical solutions are compared with experimental data for three ducted propfan configurations for different flow conditions.
Pankajakshan, Ramesh↗
Two phase flow and heat transfer in porous beds under variable body forces, part 3 Final report
Fluid mechanic techniques for two phase flow and heat transfer in porous beds under variable body forces
French, J. V., Jr.↗
Stresses in case-bonded solid-propellent rocket motors under transverse body-force loading
Two dimensional plane stress photoelastic models of star configurations in elastic case bonded solid propellant rocket motors under transverse body force loading
Parmerter, R. R.↗
Implementation of a Body Force Model into OVERFLOW for Propulsor Simulations
No abstract available
OVERFLOW↗
Optimal hybrid propulsion systems thrust trajectories in a patched-conic N-body force field
Euler-Lagrange equations for approximating optimal thrust trajectories for limited hybrid propulsion system in N-body dynamic environment
Pines, S.↗
The Kelvin-Helmholtz instability with arbitrarily oriented body force
Interfacial stability of two parallel superposed inviscid streams of fluid applied to stability of molten liquid-gas interface on ablating reentry body
INVISCID FLOW↗
LINEAR APPROACHES TO THE DYNAMICS OF FLUIDS SUBJECTED TO TIME VARYING BODY FORCES
Linear approach to dynamics of fluids at zero gravity
WEIGHTLESSNESS↗
Fluid dynamics in a cylindrical container after gravitational body force vanishes abruptly.
Euler equations of fluid motion in cylindrical container after gravitational force vanishes abruptly
FLUID BOUNDARY↗
Two phase flow and heat transfer in porous beds under variable body forces, part 1 Final report
Two phase flow through porous materials in low gravity environments
Doughty, J. O.↗
Two phase flow and heat transfer in porous beds under variable body forces, part 4 Final report
Two phase flow and heat transfer in porous beds under reduced gravity
Henry, H. R.↗
Two phase flow and heat transfer in porous beds under variable body forces, part 5 Final report
Two phase mass flowmeter with two dissimilar porous cartridges
French, J. V., Jr.↗
Two phase flow and heat transfer in porous beds under variable body forces Final report, part 6
Two phase flow and heat transfer in porous beds in reduced gravity environment
Henry, H. R.↗
Two-phase flow and heat transfer in porous beds under variable body forces, part 7
The design of an experiment to determine the behavior of two-phase vapor-liquid and gas-liquid flow through porous beds in low gravity environments is discussed. The selection of porous materials, liquids, and gases is described. The parameters necessary for the design and development of a flight experimental system are examined. The general specifications for system elements requiring additional development are identified.
Henry, H. R.↗
Two phase flow and heat transfer in porous beds under variable body forces, part 2
Analytical and experimental investigations of a pilot model of a channel for the study of two-phase flow under low or zero gravity are presented. The formulation of dimensionless parameters to indicate the relative magnitude of the effects of capillarity, gravity, pressure gradient, viscosity, and inertia is described. The investigation is based on the principal equations of fluid mechanics and thermodynamics. Techniques were investigated by using a laser velocimeter for measuring point velocities of the fluid within the porous material without disturbing the flow.
Evers, J. L.↗
Princeton series on high speed aerodynamics and jet propulsion. Volume 4: Theory of laminar flows. Section D: Laminar flows with body forces
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Ostrach, S.↗
Boiling heat transfer to LN2 and LH2 - Influence of surface orientation and reduced body forces
The quantitative determination of the influence of heater surface orientation and gravity on nucleate pool boiling of liquid nitrogen and liquid hydrogen is described. A transient calorimeter technique, well suited for obtaining pool boiling data under reduced gravity and used earlier by Clark and Merte (1963), was employed after being adapted to flat a surface whose orientation could be varied. The obtained determination results are reviewed.
Merte, H., Jr.↗