ABSTRACT Rossby wave instabilities (RWIs) usually lead to non-axisymmetric vortices in protoplanetary discs and some observed substructures of these can be explained well by RWIs. We explore how the cooling influences growth rate unstable RWI modes terms linear perturbation analysis. The associated with energy equation is treated two different ways. first approach that we adopt a simple law. pe...

In this paper a one-dimensional analytical model for the mechanism of rock fracturing in hydrothermal regimes is described. The model is based upon the modern thermo-poro-elasticity theory and its two non-linear heat-like equations. On the boundary aquifer-caprock a buried thermomechanical source is supposed to be built up in terms of subsurface fluid-rock coupling dynamics. With this considera...

Diffusion tensor imaging (DTI) studies in adolescents with autism spectrum disorders (ASD) indicate aberrant neurodevelopment of frontal white matter (WM), potentially underlying abnormal social cognition and communication in ASD. Here, we further use tract-based spatial statistics (TBSS) to examine the developmental change of WM skeleton (i.e., the most compact whole-brain WM) during adolescen...

We consider a reaction–diffusion equation with convection term in one space variable, where the diffusion changes sign from positive to negative and reaction is bistable. study existence of wavefront solutions, their uniqueness regularity. The presence reveals several new features wavefronts: according mutual positions diffusivity reaction, profiles can occur either for single value speed or bo...

A diagnostic framework is presented, based on the Nakamura effective diffusivity, to investigate the regional variation in eddy diffusivity. Comparison of three different diffusivity calculations enables the effects of locally enhanced tracer diffusion to be distinguished from the streamwise average and the distinction between locally generated complexity in the tracer structure and between tha...

Thin layer drying of Russian olive (Elaeagnusan gastifolial L.) fruit using a hot air dryer in order to calculate effective moisture diffusivity, activation energy and energy consumption has been evaluated in this article. The selected variables included three levels of air velocity of 0.5, 1 and 1.5 m/s and three air temperature levels of 50, 60 and 70°C. Increased air temperature...

The produced liquid water in cathode catalyst layer (CCL) has significant effect on the operation of proton exchange membrane fuel cell (PEMFC). To investigate this effect, the transport of oxygen in CCL in the presence of immiscible liquid water is studied applying a two-dimensional pore scale model. The CCL was reconstructed as an agglomerated system. To explore the wettability effects, diffe...

This paper presents a study on estimation of heat transfer coefficient and thermal diffusivity parameters by use of analytical solutions and experimental data for regular geometries (infinite slab, infinite cylinder and sphere). Analytical solutions have a broad use in experimentally determining these parameters. These solutions, with use of experimental data, might give a greater advantage ove...

The heat equation is a second-order parabolic partial differential equation, which can be solved in many ways using numerical methods. This paper provides solution that uses the finite difference method like explicit center method. forward time and centered space (FTCS) used to problem containing one-dimensional stability condition of scheme reported with different thermal conductivity material...