A Multiscale Analysis of Diffusions on Rapidly Varying Surfaces
A Multiscale Analysis of Diffusions on Rapidly Varying Surfaces
复制标题
快速变化表面扩散的多尺度分析
DOI:
10.1007/s00332-015-9237-x
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发表时间:
2015
影响因子:
3
通讯作者:
Duncan A
中科院分区:
文献类型:
--
作者:
Duncan A
Lateral diffusion of molecules on surfaces plays a very important role in various biological processes, including lipid transport across the cell membrane, synaptic transmission, and other phenomena such as exo- and endocytosis, signal transduction, chemotaxis, and cell growth. In many cases, the surfaces can possess spatial inhomogeneities and/or be rapidly changing shape. Using a generalization of the model for a thermally excited Helfrich elastic membrane, we consider the problem of lateral diffusion on quasi-planar surfaces, possessing both spatial and temporal fluctuations. Using results from homogenization theory, we show that, under the assumption of scale separation between the characteristic length and timescales of the membrane fluctuations and the characteristic scale of the diffusing particle, the lateral diffusion process can be well approximated by a Brownian motion on the plane with constant diffusion tensorthat depends on a highly nonlinear way on the detailed properties of the surface. The effective diffusion tensor will depend on the relative scales of the spatial and temporal fluctuations, and for different scaling regimes, we prove the existence of a macroscopic limit in each case.
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DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
M. Berg;J. T. Lewis
通讯作者:
J. T. Lewis
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
A. Bourgeat;M. Jurak;Andrey L. Piatnitski
通讯作者:
Andrey L. Piatnitski
影响因子:
2
作者:
M. King
通讯作者:
M. King
DOI:
--
发表时间:
2010
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
Ellen Reister;Stefan M Leitenberger;U. Seifert
通讯作者:
U. Seifert
影响因子:
14.2
作者:
Dziuk, Gerhard;Elliott, Charles M.
通讯作者:
Elliott, Charles M.