We present the first global 3D simulations of thermal convection in the oblate envelopes of rapidly-rotating solar-type stars. This has been achieved by exploiting the capabilities of the new Compressible High-ORder Unstructured Spectral difference (CHORUS) code. We consider rotation rates up to 85% of the critical (breakup) rotation rate, which yields an equatorial radius that is up to 17% lar...

The onset of thermal convection in a horizontal layer of fluid rotating about a vertical axis is examined by means of a nonlocal model partial differential equation (PDE). This PDE is obtained asymptotically from the Navier–Stokes and heat equations in the limit of small conductivity of the horizontal boundaries. The model describes the onset of convection near a steady bifurcation from the con...

Latent heat storage is one option to increase the efficiency and reduce CO2-emissions of process applications in temperature range between 100 °C 250 °C. In present study a latent system based on flown through exchanger plates according FracTherm®-design examined. The sugar alcohol d-mannitol used as PCM. A simplified capacity resistor (RC) simulation model developed. contrast common RC-models,...

unsteady hydromagnetic generalised couette flow of a viscous, incompressible and electrically conducting fluid between two horizontal parallel porous plates darcian channel in the presence of a uniform transverse magnetic field taking hall current and ion-slip into account in a rotating system is investigated. an exact solution of the governing equations is obtained by laplace transform techniq...

This paper describes one-dimensional (parallel) laminar and transitional regimes of natural convection in a viscous stably stratified fluid due to temporally-periodic variations in the surface temperature of infinite vertical plates and cylinders. Analytical solutions are obtained for the periodic laminar regime for arbitrary values of stratification, Prandtl number and forcing frequency. The s...