Convective dispersion without molecular diffusion
نویسندگان
چکیده
منابع مشابه
Convective dispersion without molecular diffusion
A method-of-moments scheme is invoked to compute the asymptotic, long-time mean (or composite) velocity and dispersivity (effective diffusivity) of a two-state particle undergoing one-dimensional convectivediffusive motion accompanied by a reversible linear transition (“chemical reaction” or “change in phase”) between these states. The instantaneous state-specific particle velocity is assumed t...
متن کاملConvective Dispersion in a Real Fracture
Solute transport in fractured rocks is of major interest in many applications: geothermal energy production, petroleum industry, ground water management. This work focuses on a dispersion experiment performed with a transparent replica of a real fracture. The local aperture map was extracted using the well-known Beer-Lambert law, which shows a very heterogeneous medium. The hydrodynamic apertur...
متن کاملDispersion and Diffusion
In Shannon’s landmark 1949 paper Communication Theory of Secrecy Systems, the idea of diffusive functions is briefly mentioned. We consider two common definitions of such functions mapping between binary strings of fixed length. Given the dimension of the input space, we determine the minimum dimension of the output space for which such a function exists, by explicit construction and with respe...
متن کاملRobust Control of Convective-Diffusion Systems
In the presented control approach to fluid dynamics, the basal and primal motivation arises from laminar flow control. The key issues associated with this class of problems, distributed systems governed by nonlinear partial differential equations (Navier-Stokes), are identified, and a mathematical benchmark problem reflecting those properties (the Burgers equation with periodic boundary conditi...
متن کاملChaotic advection and relative dispersion in a convective flow
– Lagrangian chaos is experimentally investigated in a convective flow by means of Particle Tracking Velocimetry. The Finite Size Lyapunov Exponent analysis is applied to quantify dispersion properties at different scales. In the range of parameters of the experiment, Lagrangian motion is found to be chaotic. Moreover, the Lyapunov depends on the Rayleigh number as Ra. A simple dimensional argu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica A: Statistical Mechanics and its Applications
سال: 2003
ISSN: 0378-4371
DOI: 10.1016/s0378-4371(03)00027-x