Turbulent Compressible Convection with Rotation. I. Flow Structure and Evolution

摘要: The effects of Coriolis forces on compressible convection are studied using three-dimensional numerical simulations carried out within a local modified f-plane model. physics is simplified by considering perfect gas occupying rectilinear domain placed tangentially to rotating sphere at various latitudes, through which destabilizing heat flux driven. resulting considered for range Rayleigh, Taylor, and Prandtl (and thus Rossby) numbers, evaluating conditions where the influence rotation both weak strong. Given computational demands these high-resolution simulations, parameter space explored sparsely ascertain differences between laminar turbulent convection. first paper in this series examines flow structure convection, its evolution, some consequences mixing. Subsequent papers consider large-scale mean shear flows that generated convective energetics transport properties.It found here similar earlier nonrotating studies, with laminar, cellular surface network disguising fully interior punctuated vertically coherent structures. However, temporal signature inertial motions yield new evolution patterns an overall increase mobility network. contains vortex tubes many scales, including structures spanning full vertical extent involving multiple density scale heights. Remarkably, such align vector via motions, contrast zonal tilting streamlines flows. Such novel mechanisms alter correlations drive shearing affect properties. In anisotropy, small-scale greater depths randomly orientated rotational mixing momentum, leading increased degree isotropy medium small scales motion there. Rotation also influences thermodynamic properties particular, interaction larger vortices causes loss correlation velocity temperature leaving stratification not isentropic.