Reflection of solitary waves from porous structures.

Presents experimental data on the characteristics of the reflected wave which forms when a solitary wave meets a vertical porous structure. The wave flume laboratory experiments and results are discussed. Deformation of the reflected wave observed in these experiments was further investigated in computer simulation studies and is described in detail. The major findings of the study were: the reflected wave initially has the same value of the pulse width (phase) parameter as the incoming solitary wave, its profile deforms during its propagation to a single solitary wave of reduced height with a depression tail, and its volume increases during deformation due to transfer of water from the developing depression tail. (J.M.M.)


Variation of the elastic constants of tourmaline with chemical composition
Tatli, Ali; Galioğlu Özkan, Yeliz (Springer Science and Business Media LLC, 1987-2)
Elastic wave velocities and lattice parameters of five tourmaline specimens with different chemical compositions have been measured. The piezoelectric effects on the elastic constants have been found to be small and can be neglected. Variations of the elastic wave velocities and elastic constants of the different tourmaline specimens indicate that: (i) partial substitution of Al by Fe in the structure decreases the shear wave velocities, (ii) replacement of Na by Ca increases the resistance of the structure...
Investigation of air bubble motion in water through a vertical narrow rectangular channel by using image processing techniques
Özdemir, Sancak; Yeşin, Ahmet Orhan; Department of Mechanical Engineering (2005)
This thesis presents the study of air bubble motion in stagnant water and in upward flowing water through a vertical narrow rectangular channel of 2.1X66.5 mm cross section by using image processing and analyzing techniques. The investigated bubble size range is 2 - 70 mm in area equivalent bubble diameter and mean water flow velocity is 0-25 cm/s. This study focuses on the quantitative assessment of bubble size (perimeter, area, volume, width and height), shape, path and rising velocity. The observed bubbl...
Radiation of dipoles in multilayered cylinder with ferrite layer
Aydin, O; Hizal, A (1996-07-26)
Radiation characteristics of infinitesimal dipole in multilayered circular cylindrical structure including gyromagnetic media are investigated. Transversal field equations in spectral domain are obtained for gyromagnetic medium in cylindrical coordinates. These expressions are formed into a set of linear differential equations. The solution at each layer is expressed in terms of state transition matrices. Fields are matched at the interfaces. Far fields are evaluated asymptotically. The effects of changing ...
Suppression of coffee-ring effect in random optical potentials
Yardımcı, Merve Yağmur; Bek, Alpan; Department of Physics (2017)
Drying a liquid (e.g. water) drop containing uniformly dispersed microscopic particles results in the particles’ migration towards the edges of the drop; after the drop evaporates the suspended particles remain concentrated around the original drop edge. This so-called “coffee-ring” effect does not depend on the nature of the solvent or the solute; thus it is ubiquitous in nature and challenging to avoid. However, in many applications such as inkjet printing, coating and many other biological processes, the...
Influence of oxygen plasma modification on surface free energy of PMMA films and cell attachment
Ozcan, Canturk; Zorlutuna, Pinar; Hasırcı, Vasıf Nejat; Hasırcı, Nesrin (2007-10-04)
For any biomaterial placed into a biological medium, the surface properties of the material, such as porosity, crystallinity, presence and distribution of electrical charge and functional groups are very critical parameters that determine the acceptance or rejection of the material. Applications, especially tissue engineering require some surface modifications at the molecular level without disturbing the bulk properties of the implants in order to enhance the cell attachment on the material. An appropriate...
Citation Formats
A. C. Yalçıner, “Reflection of solitary waves from porous structures.,” pp. 0–0, 1989, Accessed: 00, 2021. [Online]. Available: