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This solution allowed the ball to experience a drag value that is nearly half of the drag value of the same ball with a smooth surface.
The multipoint cases include five- and nine-point formulations, some of which approximate the expected drag value over the specified flight-condition probability distribution.
The proposed approach minimizes the expected drag value given by a probability density function in the space of the flight conditions, which can be estimated based on data from aircraft operations.
We conclude that if we focus on the resulting design, a five-point optimization with points based on the flight-condition distribution and equal weights is sufficient to obtain an optimal shape with respect to the expected drag value.
In this work, a baseline drag value is obtained for a simplified MAN TGX series truck in a CFD software, and the drag reduction of a proposed elliptically shaped flap is compared to aerodynamically equivalent rectangular flaps.
The drag value and cavitation criterion are determined by solving a two-dimensional nonlinear fluid-structure interaction problem, based on a static vortex lattice method with viscous boundary layer equations, for the flow, and a nonlinear elasticity solver for the deformations of the elastic components of the foil.
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The blue squares indicate the computed drag values, and the red lines correspond to the sensitivity of the respective locations.
Both the drag values given by the model and simulation results for real systems agree well with experimental data.
The unlinkage drag values of the donated segments on the carrier chromosomes were between 5.91 and 40% of the total donor component on the carrier chromosomes (Table 3).
The urban canopy drag values in three highly urbanized areas in HK, including Kowloon West, Kowloon East and Hong Kong Island North, were obtained and are discussed in detail.
The open wings exhibit highly nonlinear unsteady aerodynamic characteristics; they also stall earlier and have higher drag values than the closed wings.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com