Mathematical Modeling of Electrically Heated Monolith Converters: Power and Energy Reduction Strategies

1996 ◽  
Author(s):  
Se H. Oh ◽  
Edward J. Bissett ◽  
David B. Brown ◽  
Frank Ament
Keyword(s):  
Mathematical Modeling ◽  
Energy Reduction ◽  
Reduction Strategies ◽  
Power And Energy

scholarly journals Aeroacoustics of Silent Owl Flight

2020 ◽  
Vol 52 (1) ◽  
pp. 395-420 ◽  
Author(s):  
Justin W. Jaworski ◽  
N. Peake
Keyword(s):  
Mathematical Modeling ◽  
Noise Reduction ◽  
Current Knowledge ◽  
Foraging Strategies ◽  
Aerodynamic Noise ◽  
Noise Generation ◽  
Reduction Strategies ◽  
Noise Measurements ◽  
Modeling And Experiments ◽  
Review Current

The ability of some species of owl to fly in effective silence is unique among birds and provides a distinct hunting advantage, but it remains a mystery as to exactly what aspects of the owl and its flight are responsible for this dramatic noise reduction. Crucially, this mystery extends to how the flow physics may be leveraged to generate noise-reduction strategies for wider technological application. We review current knowledge of aerodynamic noise from owls, ranging from live owl noise measurements to mathematical modeling and experiments focused on how owls may disrupt the standard routes of noise generation. Specialized adaptations and foraging strategies are not uniform across all owl species: Some species may not have need for silent flight, or their evolutionary adaptations may not be effective for useful noise reduction for certain species. This hypothesis is examined using mathematical models and borne out where possible by noise measurements and morphological observations of owl feathers and wings.

Power and energy reduction via pipeline balancing

2001 ◽  
Vol 29 (2) ◽  
pp. 218-229 ◽  
Author(s):  
R. Iris Bahar ◽  
Srilatha Manne
Keyword(s):  
Energy Reduction ◽  
Power And Energy
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