The advantage of a smooth representation bathymetry in terrain-following σ-coordinate ocean models is compromised by the need to avoid numerical errors on steep slopes associated with pressure gradient discretization or spurious diapycnal diffusion. Geopotential z-coordinate these errors, but greatly underrepresent interaction flow topographic slope, especially when underresolved. Hybrid coordi...

The physical configuration of the problem Darcy Brinkman (DB) Rayleigh Benard Two-Component (RBTC) Convection in a two-layered system has been investigated for linear, parabolic and inverted salinity gradients with Dufour effect. For fluid layer, upper boundary is free surface tension porous lower rigid. At interface, normal velocity, stress, shear mass, mass flux, heat, heat flux are continuou...

A numerical simulation is performed for heat transfer enhancement in a parallel-plate exchanger equipped with multiple metal foam blocks of various size. Localized sources are placed on the top wall location metallic blocks. The Brinkman-Forchheimer-extended Darcy model used to characterize flow field inside region. Solution coupled governing equations composite fluid/ system obtained using fin...

The major finding of this paper is studying the stability a double diffusive convection using so-called local thermal non-equilibrium (LTNE) effects. A new combined model that we call it Brinkmann-Forchheimer was considered in inquiry. Using both linear and non-linear analysis, used saturated rotating porous layer when fluid solid phases are not state non-equilibrium. In addition, discussed sev...

The effect of entropy optimization on an axisymmetric Darcy–Forchheimer Powell–Eyring nanofluid flow caused by a horizontally permeable stretching cylinder, as well non-linear thermal radiation, was investigated in this research work. leading equations the current problem were changed into ODEs exhausting appropriate transformations. To deduce reduced system, numerical method bvp4c used. outcom...

The impacts of slip effects on the mixed convective flow a Casson fluid near stagnation point past vertical plate embedded in Darcy−Brinkman porous medium have been scrutinized. Assisting as well opposing flows are considered. Similarity equations obtained before being solved numerically using shooting method. Influences substantial parameters temperature distribution, velocity profile along wi...

natural convective heat transfer of nano-fluid in porous media is present in many advanced engineering applications. in this work, this problem has been computationally simulated, using lbm. the configuration used includes a cold exterior region and hot interior cylinders with one-, two-, or three-cylinder arrangements. however, the effective area for heat transfer has been kept the same for al...

The two-field thermal conditions of local nonequilibrium (LTNE) were used to investigate linear stability convection in a liquid-saturated, porous layer via the extended Brinkman–Darcy model for different non-uniform basic gradients. critical values numerically computed by Galerkin method rigid isothermal boundaries. impact LTNE and forms temperature gradients on onset was examined. porosity mo...