Jan 31, 2019Open AccessArticle
In this paper, we mainly study the existence and uniqueness of solutions and the asymptotic behavior of solutions for three-dimensional globally modified Bénard systems with delays under local Lipschitz conditions.
Jun 08, 2018Open AccessArticle
The objective of this study is to consider the flow of temperature dependent viscosity and thermal conductivity of free convective heat and mass transfer of viscoelastic fluid over a stretching surface with nth order of chemical reaction and thermophoresis. The effect of the temperature dependent dynamic viscosity and thermal conductivity together with modified thermal and solutal Grashof numbers are properly
Feb 12, 2018Open AccessArticle
In several areas of
engineering, it is
possible to put real problems in mathematical functions; when we represent a problem with variables in the
form of function, we were
able to extract various information from it. This paper compared two different
mathematical methods, being the finite difference method and the Fourth Order
Range-Kutta method, to analyze the concentration and temperature of
Jan 22, 2018Open AccessArticle
Instability of liquid
dielectrics surface, being developing after the action of an alternating
current corona discharge pulse, has been experimentally investigated. Voltage
amplitude on the corona electrode reaches 70 kV, frequency is 17 MHz, and pulse
duration is 0.5-1 μs. This is similar to
rose-window instability at electrode height above the liquid surface > 5-10 mm. At lesser heights,
development of a singular crater is ob
Dec 24, 2015Open AccessArticle
This paper presents results of a modeled open channel flow through a
porous media (River). In the model, we considered water as an incompressible
fluid; the flow as steady and uniform; the system is assumed to be isothermal
and the flow pattern is laminar. We have solved the resulting Brinkman equation
using analytical method. By some mathematical operation, the momentum partial
differential equation (PDE) was reduced to ordinary differential equation (ODE)
and the resulting equations are solved...
Nov 23, 2015Open AccessArticle
The paper analyzes the nonlinear damping torque and nonlinear restoring moment
and establishes the nonlinear motion equation of ship rolling under random sea.
The Runge-Kutta method is used in the time domain to solve the equation, and to
simulate the time history of random wave excitation ship rolling and free decay
process. This paper used the ship attitude inertial measurement system and its
algorithm technology to construct the ship rolling angle from the acceleration
measuring signals and t...
Jun 19, 2015Open AccessArticle
The fact is that it is always attempted to develop suitable motivation factors satisfying company management needs in this very sensitive as well as vital aspects of development. Each of existing approaches at some point has been applied and tested as to its effects on people’s lives, jobs, and personal goals in life as well as in the work place. Honestly, it is very difficult to find out motivation factors, which can be used in wide areas of management process. There is no flexible manner of fa...
Feb 13, 2015Open AccessArticle
In this work, the effect of transverse horizontal electric field on the
stability of three layers of immiscible liquids is illustrated. The fluids are
subjected to a uniform horizontal electric field. Analytical and numerical
simulations of this system of linear evolution equations are performed. The
solutions of the linearized equations of motion and the boundary conditions
lead to deriving two simultaneous Mathieu equations of damping terms having
complex coefficients. The effects of the strea...
Feb 06, 2015Open AccessArticle
The non-uniqueness of the relation between the pressure gradients of
general relativity and its Newtonian counterpart is demonstrated. This may lead
to a non-unique relation between the two force laws.
Dec 25, 2014Open AccessArticle
In this paper, a
Lattice Boltzmann method was used to simulate the flow of temperature-sensitive
magnetic fluids in a micro porous cavity. According to Navier’s linear slip
length model, slip boundary conditions were used on all the walls of the micro
porous cavity. The effects of the horizontal slip length and the vertical slip
length on the flow and heat transfer characteristics were investigated. The results
showed that with the increase of the slip length, the velocities and their