The results of that work have been published in the journal Nano Letters, in a paper co-authored by Mil...

In this video, Kiran Dellimore gives a broad overview of his research paper entitled  'Influence of a Streamwise Pressure Gradient on Film-Cooling Effectiveness' published in the JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER,Vol. 23, No. 1, January-March 2009. His co-authors are Carlos Cruz, Andre W. Marshall, and Christopher P. Cadou all from the University of Maryland, College Park, Maryland 20742.

The paper may be accessed using the following DOI: 10.2514/1.35717

Film cooling is widely used in conventional gas turbine and rocket engines to minimize thermal loading of engine structures and to manage heat transfer between hot, reacting gases and cooler structural components. Previous experimental work has shown that streamwise pressure gradients strongly influence the performance of the film.This paper extends semi-empirical modeling ideas for wall-jet film cooling to include the effects of adverse and favorable pressure gradients. The extended model shows that a pressure gradient’s effect on cooling performance depends on whether the velocity of the film is greater than the core flow (a wall-jet...

Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but sometimes is used to be synonymous with "oscillation." Oscillations occur not only in physical systems but also in biological systems and in human society.

The simplest mechanical oscillating system is a mass attached to a linear

Main Article from Howard Hughes Medical Institute

Blood flow in the microcirculation is regulated by physiological O2 gradients that are coupled to vasodilation and vasoconstriction, but the mechanism underlying this fundamental vascular response (which controls O2 delivery to tissues) has remained a major unanswered question in vascular physiology. The discovery of a previously unknown S-nitrosothiol (SNO) derivative of hemoglobin that has potent vasodilatory activity has changed the picture. Most significantly, the affinity of cysteine β93 for NO is high in the R (or oxy) structure and low in the T (or deoxy) structure. Thus, deoxygenatio...

This video details planetary motion or orbital mechanics. It explains Kepler's and Newton's Laws plus terminology including perigee, apogee, eccentricity, orbital inclination, launch window, etc. Orbital mechanics or astrodynamics is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft. The motion of these objects is usually calculated from Newton's laws of motion and Newton's law of universal gravitation. It is a core discipline within space mission design and control. Celestial mechanics treats more broadly the orbital dynamics of systems under the influence of gravity, including both spacecraft and natural astronomical bodies such as star systems,

High performance jet fighters have used a variety of morphing mechanisms in the past such as variable-sweep wings and fowler flaps to expand the flight envelope. Lockheed Martin (NYSE: LMT) is a leading multinational aerospace manufacturer and advanced technology company formed in 1995 by the merger of Lockheed Corporation with Martin Marietta. It is headq...