The study is devoted to a linear stability problem for system of two horizontal porous sublayers separated by an air interlayer under the influence gravity field. are capable generating heat with constant volumetric strength source proportional solid volume fraction. Equal temperatures maintained at external boundaries three-layered system. onset value internal convection numerically determined...

identification of damping parameter is usually more complicated and unreliable comparing to mass or stiffness identification in structural dynamics. there are many factors such as intermolecular friction, coulomb friction and viscous damping affecting the damping mechanisms in a structure. therefore it is difficult, and in some cases impossible, to describe the details of damping mechanisms by ...

Nowadays, wireless sensor networks (WSNs) are used in a wide range of application scenarios ranging from structural monitoring to health-care, from surveillance to industrial automation. Most of these applications require forms of secure communication. On the other hand, security has a cost in terms of reduced performance. In this paper we refer to the IEEE 802.15.4 standard and investigate the...

in this paper, we study the effects of hall and ion-slip currents on the steady magneto-micropolar of a viscous incompressible and electrically conducting fluid over a horizontal plate by taking in to account the viscous dissipation effects. by means of similarity solutions, deviation of fundamental equations on the assumption of small magnetic reynolds number are solved numerically by using qu...

Parameterizations for bottom shear stress are required to predict sediment resuspension from field observations and within numerical models that do not resolve flow the viscous sublayer. This study assessed three observation-based (τb) parameterizations, including (a) sum of surface wave mean current (quadratic) (); (b) log-law (τb = τL); (c) turbulent kinetic energy τTKE); using 2 years a larg...

A large eddy simulation wall model is developed based on a formal interpretation of quasi-equilibrium that governs the momentum balance integrated in wall-normal direction. The substitutes law-of-the-wall velocity profile for smooth surface into balance, leading to Lagrangian relaxation towards equilibrium (LaRTE) transport equation friction vector $\mathbf{u}_\tau(x,z,t)$. This partial differe...

Lamadian Oilfield has entered the late stage of ultra-high water cut development, and producing conditions each sublayer are different. In order to know more clearly, it is necessary count reserves output sublayer. Therefore, finely divide liquid oil production well. The former splitting method only considered formation influencing factors, that is, coefficient, which could not meet differences...

With the development in additive manufacturing, use of surface treatments for gas turbine design applications has greatly expanded. An experimental investigation pressure loss and heat transfer characteristics within impingement jet arrays with target micro cooling units is presented. The discharge coefficient Nusselt number are measured determined an evaluation flow system level, respectively....