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Entry guidance for human lunar return vehicles with low lift-to-drag ratios
(2010)
During the entry phase of a human lunar mission, an entry guidance algorithm is used to safely steer the return vehicle through the atmosphere to a target landing site. The PredGuid entry guidance algorithm is enhanced to ...
Immersed boundary methods with applications to flow control
(2001)
While some engineers use computers as a first line of attack on design problems, others are persistently making computers and their software faster and more capable of solving realistic problems. The technology used to ...
Exploratory study on the use of baffles in cavity flow for the suppression of convection and temperature oscillations in microgravitational environment
(1993)
The quality of crystals grown from melt depends on the flow field in the melt. To simulate melt conditions, a finite element analysis is performed on flow in a heated cavity under the driving forces of natural convection, ...
Variational multiscale methods for turbulence control
(2003)
Large Eddy Simulation (LES) is an efficient computational tool for turbulence simulation. Variational Multiscale (VMS) is a new paradigm for LES that uses variational projection instead of spatial filtering that obviates ...
A prosthetic hand with tactile sensing
(1994)
With recent advances in myoelectric signal processing, powered prosthetic hands with myoelectric control have become more accepted among users of prosthetic hands. Inspite of this progress, the hands that are currently ...
A nonlinear isoparametric contour plotting and filling algorithm
(1988)
An interactive isoparametric contour plotting and filling program, ISOCON, is developed for use with finite element meshes using common two-dimensional triangular and quadrilateral elements. The program uses the local ...
Unsteady heat transfer from a sphere at low Reynolds and Strouhal numbers
(1992)
Heat transfer from a sphere in a traveling sound wave is studied using an axi-symmetric formulation. The effect of a reversing flow on the flow behavior is examined and formation of separation regions and vortex shedding ...
Probabilistic analysis in surface water hydrology: Open drainage channels and detention basins
(1996)
A reliability-based method for analyzing open drainage channels and detention basins using the full marginal distributions of uncertain parameters together with correlation coefficients will be presented in this work. A ...
Coupling a dynamically updating velocity profile and electric field interactions with force bias Monte Carlo methods to simulate colloidal fouling in membrane filtration
(2009)
Work has been completed in the modeling of pressure-driven channel flow with particulate volume fractions ranging from one to ten percent. Transport of particles is influenced by Brownian and shear-induced diffusion, and ...
Autonomous optical navigation for lunar missions
(2009)
Four measurement options for Orion autonomous optical lunar navigation are analyzed using linear covariance analysis methods. The measurements include a feature tracking camera measurement, star landmark elevation measurement, ...