The Pencil Code is primarily designed to deal with weakly compressible turbulent flows, which is why we use high-order first and second derivatives. To achieve good parallelization, we use explicit (as opposed to compact) finite differences. Typical scientific targets include driven MHD turbulence
... [More] in a periodic box, convection in a slab with non-periodic upper and lower boundaries, a convective star embedded in a fully nonperiodic box, accretion disc turbulence in the shearing sheet approximation, self-gravity, non-local radiation transfer, dust particle evolution with feedback on the gas, etc. A range of artificial viscosity and diffusion schemes can be invoked to deal with supersonic flows. For direct simulations regular viscosity and diffusion is being used. [Less]
The objective of the project is to develop a multi-threaded application server for PHP, written in PHP. Yes, pure PHP! You think we aren't serious? Maybe! But we think, in order to enable as many developers in our great community, this will be the one and only way to enable you helping us. Through
... [More] the broadest possible support of the PHP community we hopefully establish this solution as the standard for enterprise applications in PHP environment. [Less]
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