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Most models use meshes which are either structured (Cartesian or curvilinear grids) or unstructured (triangular, tetrahedral, etc.). Gerris is quite different on this respect: it implements a deal between structured and unstructured meshes by using a tree data structure, [a] allowing to refine locally (and dynamically) the (finite-volume) description of the pressure and velocity fields.
A direct numerical simulation (DNS) [1] [2] is a simulation in computational fluid dynamics (CFD) in which the Navier–Stokes equations are numerically solved without any turbulence model. This means that the whole range of spatial and temporal scales of the turbulence must be resolved.
Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns, understanding nebulae in interstellar space and modelling fission weapon detonation. Below is a structured list of topics in fluid dynamics.
In physics, physical chemistry and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids – liquids and gases. It has several subdisciplines, including aerodynamics (the study of air and other gases in motion) and hydrodynamics (the study of water and other liquids in motion).
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B. Ataie-Ashtiani and L. Farhadi, "A stable moving particle semi-implicit method for free surface flows," Fluid Dynamics Research 38, pp. 241–256, 2006. H. Gotoh and T. Sakai, "Key issues in the particle method for computation of wave breaking," Coastal Engineering, Vol 53, No 2–3, pp. 171–179, 2006.
In fluid dynamics, dynamic pressure (denoted by q or Q and sometimes called velocity pressure) is the quantity defined by: [1] = where (in SI units): q is the dynamic pressure in pascals (i.e., N/m 2, ρ (Greek letter rho) is the fluid mass density (e.g. in kg/m 3), and; u is the flow speed in m/s.
The journal focuses on fluid dynamics and also covers geophysical fluid dynamics, biofluid dynamics, nanofluidics and magnetohydrodynamics. Its lead editors are Eric Lauga (University of Cambridge) and Beverley McKeon (California Institute of Technology). [1] The journal launched in January 2016 and published its 500th article in 2017. [2]