منابع مشابه
The Mechanics of Glacier Flow
The flow of valley glaciers is examined in the light of recent laboratory experiments on the behaviour of ice under load. Simple expressions are given for the velocity distributions in some cases of laminar flow, and the modification of a pure laminar flow theory necessary to explain the formation of transverse crevasses and thrust planes is considered. The paper ends with some remarks about th...
متن کاملThin-film Flows with Wall Slip: an Asymptotic Analysis of Higher Order Glacier Flow Models
Free-surface thin film flows can principally be described by two types of models. Lubrication models assume that shear stresses are dominant in the force balance of the flow, and are appropriate where then is little or no slip at the base of the flow. Conversely, membrane or ‘free film’ models are appropriate in situations where there is rapid slip and normal (or extensional) stresses play a si...
متن کاملGlacier Flow in a Curving Channel
The flow of a glacier along a channel of constant longitudinal curvature is analyzed using analytical and finite-element methods. Channels of various cross sectional shape are investigated, ranging from a simple rectangular form with zero shear traction along the bed to realistic profiles taken from Blue Glacier, Washington. Terms in the equilibrium and rate-of deformation equations which are ...
متن کاملSome Comments on Glacier Flow
Drs . O rowan and Perutz have shown that glacier ice does not behave as a viscous fluid but is plastic like all crystalline materials. The present authnr discusses two observed types of ice flow :-( 1) the normal, regular streaming flow in s low-moving glaciers; (2) Block-Sclzol/en" movement in swi ftl y flowing ice. Mention is made of the shear plane or laminar flow theory of Philipp. It appea...
متن کاملHigh Resolution Modelling of Glacier Flow
This thesis aims to develop and apply models of glacier flow at sufficiently high resolution to permit meaningful and accurate comparison with field data. At present there exists a discrepancy between the scales at which realistic simulations of glacier flow operate and the empirical data with which they are compared. This is true at a variety of spatial scales; from reconstructing the dynamics...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1949
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000009813