Design study of a Fourier spectrometer ellipsoidal mirror reflectometer system Final report
Optimization of interferometer and ellipsoidal reflectometer to measure reflectance of opaque materials
Kneissl, G. J.↗
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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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Theory of a Potential for Satellite Motion About a Triaxially Ellipsoidal Planet
Potential theory for satellite motion about triaxially ellipsoidal planet
Maddox, S. J., Jr.↗
The expansion of the potential of a homogeneous ellipsoid in a series of tesseral harmonics.
Homogeneous triaxial ellipsoid Newtonian potential expansion in series of tesseral harmonics
Sperling, H. J.↗
The ellipsoidal velocity distribution function
Relation between ellipsoidal velocity distribution function and macroscopic flow equations
Stankiewicz, N.↗
Slosh force, natural frequency, and damping of low-gravity sloshing in oblate ellipsoidal tanks
Liquid sloshing under moderately low simulated gravity in oblate ellipsoidal tank geometries
Dodge, F. T.↗
The supersonic leading edge problem according to the ellipsoidal model.
Supersonic leading edge problem using nonlinear Boltzmann equation with ellipsoidal model, calculating molecular distribution functions for flow field
Huang, A. B.↗
Simulated low-gravity sloshing in spherical, ellipsoidal and cylindrical tanks.
Simulated low gravity propellant sloshing in spherical, ellipsoidal and cylindrical tanks, discussing Bond number simulation and tank geometry effects
Dodge, F. T.↗
The calculation of N-dimensional probability ellipsoids
Calculation of N-dimensional probability ellipsoids
Lancaster, E. R.↗
Simulated low-gravity sloshing in spherical, ellipsoidal, and cylindrical tanks
Simulated low gravity propellant sloshing in spherical, ellipsoidal and cylindrical tanks, discussing Bond number simulation and tank geometry effects
Dodge, F. T.↗
Supersonic leading edge problem according to the ellipsoidal model
Supersonic leading edge problem solved by ellipsoidal model using discrete ordinate method compared with BGK model solution
Huang, A. B.↗
A separable potential in triaxially ellipsoidal coordinates satisfying the Laplace equation
General potential function in triaxially ellipsoidal coordinates for Laplace equation, examining near earth satellites and Vinti potential
Madden, S. J., Jr.↗
The disklike Riemann ellipsoids
Galactic evolutionary models using disklike Riemann ellipsoids with internal motions and gravitational gas equilibria
Hunter, C.↗
Ellipsoidal mirror reflectometer including means for averaging the radiation reflected from the sample Patent
Ellipsoidal mirror reflector for measuring reflectance
Dunn, S. T.↗
Some analytic solutions to the linearized Boltzmann equation with the ellipsoidal model
Linearized Boltzmann equation analytic solutions for rarefied gas dynamic problems, using ellipsoid model
Giddens, D. P.↗
Sting-free drag measurements on ellipsoidal cylinders at transition Reynolds numbers
Sting-free aerodynamic drag measurement on ellipsoidal cylinders in subsonic wind tunnel at transition Reynolds numbers
Covert, E. E.↗
Pressure perturbation in EHD contacts due to an ellipsoidal asperity
The pressure fluctuations around an ellipsoidal asperity tip at the inlet region of an elastohydrodynamic contact is determined by solving a perturbed Reynolds equation assuming that the asperity shape is unaffected by the perturbed pressure. Results are presented as the amplitude of the perturbed pressure as a function of ellipticity ratio, maximum Hertzian pressure, nominal EHD film thickness, asperity size, asperity height, and pressure viscosity coefficient. For the case of simple sliding between a smooth surface and a stationary asperity, a comparison is also made between the results for large ellipticity ratios and the pressure fluctuations obtained by using a previous line contact EHD analysis for a two-dimensional asperity ridge. The agreement is found to be close for moderate Hertzian pressure and relatively thick EHD film thickness.
Chow, L. S. H.↗
Effects of tidal distortion on binary-star velocity curves and ellipsoidal variation
Radial velocity curves for the more massive components of binaries with extreme mass ratios can show a large distortion due to tides, as first recognized by Sterne. Binaries in which the effect is large should be rare because nearly all such binaries would be in the rapid phase of mass transfer. However, the optical counterparts of some X-ray binaries may show the effect, which would then serve as a new means of extracting considerable information from the observations. The essential parts of the computational procedure are given. Light curves for ellipsoidal variables with extreme mass ratios were also computed, and were found to be less sinusoidal than those with normal mass ratios.
Wilson, R. E.↗
Calculation of the attenuation and phase displacement per unit of length due to rain composed of ellipsoidal drops
All of the phenomena which influence the propagation of radiowaves at frequencies above 10 GHz (attenuation, depolarization, scintillation) can by intensified by parameters directly derived from a solution of individual scatter, naturally in addition to be meteorological elements which characterize the physical medium. The diffusion caused by rainy precipitation was studied using Mie's algorithm for rain composed of spherical drops, and Oguchi's algorithm for rain composed of drops in an ellipsoidal form with axes of rotational symmetry arrange along the vertical line of a generic reference point. Specific phase displacement and attenuation along the principal planes, propagation of radiowaves in generic polarization, and propagation with inclined axes are also considered.
Maggiori, D.↗