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Frequency: 12 issues per year
ISSN: 2250–3005 (online version)
Published by: IJCER
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International Journal of Computational Engineering Research

(IJCER)

 

Articles

 

Research Article  open access
The Effect of Bottom Sediment Transport on Wave Set-Up
NIGERIA
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 07 ~ Issue 6 (June – 2017)

Abstract

In this paper we augment the wave-averaged mean field equations commonly used to describe wave set-up and wave-induced mean currents in the near-shore zone, with an empirical sediment flux law depending only on the wave-induced mean current and mean total depth. This model allows the bottom to evolve slowly in time, and is used to examine how sediment transport affects wave set-up in the surf zone. We show that the mean bottom depth in the surf zone evolves according to a simple wave equation, whose solution predicts that the mean bottom depth decreases and the beach is replenished. Further, we show that if the sediment flux law also allows for a diffusive dependence on the beach slope then the simple wave equation is replaced by a nonlinear diffusion equation which allows a steady-state solution, the equilibrium beach profile.......

Keywords: water waves, mean flow, sediment transport

Research Article  open access
Wave-Current Interaction Model on an Exponential Profile
Dr. Evans F. Osaisai
Nigeria
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 07 ~ Issue 6 (June 2017)

Abstract

We develop a model that approximates the exponential depth, which exhibits the behavior of linear depth particularly in the surf zone. The main effect of the present exponential depth is found in the shoaling zone, where the depth remains finite. The basic description and the outcome is essentially rip currents where in the surf zone the wave behavior is the same as found in the linear depth case. In the shoaling zone the present exponential depth exhibits the hypergeometric functions

Keywords:Surf zone, Shoaling zone, wave setup, wave setdown, rip currents, radiation stress, wave action.

Research Article  open access
Analysis of Metamaterial Based Microstrip Array Antenna
R.K.Verma
India
Paper Indexed : : 03.3005/xxxxxxx
International Journal of Computational Engineering Resaerch, Volume 07 ~ Issue 6 (June 2017)

Abstract

Metamaterials have been intensively researched due to their peculiar features such as negative permittivity and/or permeability and ultra-refraction phenomenon. To satisfy the demand of commonly used wireless communication systems, an antenna which can operate at higher frequencies and enhanced characteristics are desirable. The arrangement of all elements is done that they provide an improvement in bandwidth, directivity return loss etc. The frequency response of a metamaterial can be tailored by varying its characteristics. A new metamaterial structure using square and ring split ring resonator is proposed. Using this metamaterial structure, a microstrip patch antenna is designed with enhanced characteristics such as reduction in return lossfrom-20dB to -36dB with tunability is achieved.

Keywords: Double negative materials, directivity, return loss, bandwidth enhancement.