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effect of postharvest application of chitosan and calcium chloride on decay and quality attributes of sweet cherry
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15 صفحه اولUnsteady Aerodynamics and Trailing-edge Vortex Sheet of An Airfoil
Unsteady flow models of wings and airfoils have been studied to understand the aerodynamic performance of natural flyers and provide improved maneuverability for micro aerial vehicles (MAVs). Vortex methods have been extensively applied to reduce the dimensionality of these aerodynamic models, based on the proper estimation of the distribution and evolution of the vortices in the wake. In such ...
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We apply evolution strategies to optimize the instability growth of several pairs of vortices which model the wake of airplanes in landing configuration. For the case of two pairs, the evolution strategy finds a set of optimal parameters strikingly similar to those found in the linear stability analysis of Crouch (1997). The case of four pairs is also considered and leads to a larger distortion...
متن کاملDecay of Far Flow Field in Trailing Vortices
A finite-difference machine code is brought to bear on the wake-vortex problem in the quasi-cylindrical boundary-layer approximation. A turbulent-energy model containing new features is developed that accounts for the major effects disclosed by more advanced models in which the parameters are not yet established. Several puzzles are resolved that arose in previous theoretical investigations of ...
متن کاملDecay of soliton-like perturbations into vortex - anti vortex pairs
This paper suggests a method to create dark soliton-like waves in a trapped atomic Bose-Einstein condensate (BEC). With the phase imprinting method, a soliton-like disturbance is produced along the x-axis. The method is used in two cases (with and without rotation of a trapping potential). The disturbance in a two-dimensional (2D) system is unstable. The soliton-like perturbation is found to de...
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ژورنال
عنوان ژورنال: Bulletin of JSME
سال: 1978
ISSN: 0021-3764,1881-1426
DOI: 10.1299/jsme1958.21.98