منابع مشابه
Effects of sash movement and walk-bys on aerodynamics and contaminant leakage of laboratory fume cupboards.
In order to speculate the physical mechanisms of contaminant leakage during sash movement and walk-bys through a laboratory fume cupboard, the complicated three-dimensional flow patterns and the real-time tracer gas leakage are studied via the laser-assisted flow visualization method and the standard gas sampling technique, respectively, over a transparent, full scale chemical fume cupboard. Th...
متن کاملAerodynamics and performance verifications of test methods for laboratory fume cupboards.
The laser-light-sheet-assisted smoke flow visualization technique is performed on a full-size, transparent, commercial grade chemical fume cupboard to diagnose the flow characteristics and to verify the validity of several current containment test methods. The visualized flow patterns identify the recirculation areas that would inevitably exist in the conventional fume cupboards because of the ...
متن کاملRe-engineering Aerodynamics Education
Aerodynamics curriculum in undergraduate engineering has reached a critical juncture forcing the need for change in the traditional, largely theoretical curriculum and lecturer/listener pedagogy. The role of aerodynamics in aerospace engineering, while still important, is no longer the dominant driver in aircraft design. Furthermore, industry, government, and academia --the likely employers of ...
متن کاملAerodynamics of Spheres
Introduction This discussion is a qualitative treatment of a topic that is usually treated rigorously and quantitatively in engineering textbooks. This discussion is intended for the general audience of nonspecialists and will attempt to convey the main ideas behind aerodynamics of spheres in a qualitative manner, with a minimum number of mathematical equations. As the Latin roots of the word i...
متن کاملStudies of Baseball Aerodynamics
Analysis of the aerodynamic forces acting on baseball pitches from major league games reveals a large variance in the measured coefficients of lift and drag. We have examined possible explanations for this effect and found that, while uncertainties introduced by measurement error and the method of reporting major league pitch trajectories do explain some of the spread, the reasons for the large...
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ژورنال
عنوان ژورنال: Journal of Educational Sociology
سال: 1931
ISSN: 0885-3525
DOI: 10.2307/2961018