This paper presents p-adaptive hybridized flux reconstruction schemes to reduce the computational cost of implicit discretizations. We first introduce spatial and temporal discretization discuss adaptation algorithm via a nondimensional vorticity indicator for methods with globally continuous discontinuous numerical traces. At each level, projection operations are applied determine new space based on element-wise projected solution transmission conditions. validate our implementation analyze...

For turbulent problems of industrial scale, computational cost may become prohibitive due to the stability constraints associated with explicit time discretization underlying conservation laws. On other hand, implicit methods allow for larger time-step sizes but require exorbitant resources. Implicit-explicit (IMEX) formulations combine both temporal approaches, using an method in nonstiff portions domain and stiff portions. While these can be shown orders magnitude faster than typical...

We present the hybridization of flux reconstruction methods for advection-diffusion problems. Hybridization introduces a new variable into problem so that it can be reduced via static condensation. This allows solution implicit discretizations to done more efficiently. derive an energy statement from stability analysis considering range correction functions on hybridized and embedded schemes. Then, we establish connections standard formulations. devise post-processing scheme leverages...

An experimental investigation is conducted to evaluate the effect of strakes on crossflow drag coefficient a typical noncircular cylinder at subcritical Reynolds numbers. The strake height and, more particularly, its location windward face, has strong influence flow pattern, and coefficient. Substantial reductions order 80% are found be possible by this technique.

Understanding the origins of life has been one greatest dreams throughout history. It is now known that star‐forming regions contain complex organic molecules, as Polycyclic Aromatic Hydrocarbons (PAHs), each which particular infrared spectral characteristics. By understanding PAH species are found in specific regions, we can better understand biochemistry takes place interstellar clouds. Identifying and classifying PAHs not an easy task: only observe a single superposition spectra at any...

This paper describes the design of a second generation infrared thermography system for use in re-entry vehicle.Due to large number contaminants such as hydrazine and partial oxidation surfaces simultaneous observation temperature emissivity must be performed.To this end multispectral concept was validated laboratory tests implemented design.

A theoretical investigation of the influence metal shields on antenna radiation patterns is performed. This study allows us to determine proper dimensions a circular cylindrical finite perfectly conducting shield placed ground around infinitesimal sources located at its axis, in order reduce ground-side lobe. Two different methods are applied this study: 1) integral equation method (IE) and 2) geometrical theory diffraction (GTD). When become very large compared wavelength, first involves...

The reduction of response motion experienced by monohull marine structures through energy dissipation performed passive stabilisers such as bilge keels is an inexpensive system, when compared to the active systems or stabilising fluid tanks. This main reason why, despite obvious advances in and control, are still designed, produced fitted most recent ships other produced. design philosophy roll has been, is, often based on empirical codes that define a standard structural arrangement, which...

We present p-adaptive hybridized flux reconstruction schemes to reduce the computational cost of implicit discretizations using a nondimensional vorticity indicator.At each adaptation level, we apply projection operation new space based on element-wise projected solution and transmission conditions.We validate our implementation analyze performance via numerical examples.Specifically, show that p-adaptation hybridizable (HFR) methods results in comparable error standard p-uniform (FR) with...

We present the hybridization of flux reconstruction methods for advection-diffusion problems. Hybridization introduces a new variable into problem so that it can be reduced via static condensation. This allows solution implicit discretizations to done more efficiently. derive an energy statement from stability analysis considering range correction functions on hybridized and embedded schemes. Then, we establish connections standard formulations. devise post-processing scheme leverages...

This work consists on the application of uniform theory diffraction Kouyoumjian-Pathak to specific problem an vertical short electric dipole coincident with axis a cylindrical, finite, perfectly conducting shield. The results are presented in form radiation patterns. They mainly analyzed transition regions shadow and reflection boundaries compared those obtained by integral equation method Keller's theory, both already known. For different sizes structure we could determine how better each...

This paper presents the results of investigations into mechanics and failure modes structural details usually encountered in lightweight marine structures. The analyses are performed using non-linear finite element analysis. stress concentration factors expected fatigue lives as designed built evaluated alternative configurations discussed with aim improving designs for production.