The converging flow of viscoplastic fluid in a wedge or cone
The converging flow of viscoplastic fluid in a wedge or cone
复制标题
粘塑性流体在楔形或圆锥形中的会聚流动
DOI:
10.1017/jfm.2021.112
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发表时间:
2021
影响因子:
3.7
通讯作者:
Taylor-West J
中科院分区:
文献类型:
--
作者:
Taylor-West J
Converging flows of viscoplastic fluids, driven steadily through wedges and axisymmetric cones, are studied analytically and numerically. When the yield stress is relatively large, the bulk of the fluid flows plastically apart from within thin layers where the fluid is strongly sheared in order to achieve no slip at the boundary. Conversely, when the yield stress is relatively small, the motion is viscously dominated with weak corrections to the velocity and stress fields due to viscoplastic effects. For both regimes, viscoplasticity induces a weak angular velocity, directed away from the boundaries, and purely radial flow is not possible. The structure of the flow is calculated using asymptotic methods, confirmed by finite element numerical simulations. Flows of both Bingham and Herschel–Bulkley fluids are analysed, and both planar and axisymmetric geometries are considered. Although these cases differ in their details, they share the same qualitative structure. In particular, the viscoplastic boundary layers that emerge when the yield stress is relatively large, ensure not only that no slip is enforced, but also, through an intermediate matching layer, that the shear rates remain bounded.
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DOI:
--
发表时间:
1955
期刊:
影响因子:
--
作者:
R. Shield
通讯作者:
R. Shield
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
N. Şandru;C. Camenshi
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C. Camenshi
影响因子:
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作者:
R. Wildman;S. Blackburn;D. Benton;P. McNeil;D. Parker
通讯作者:
D. Parker
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
D. Durban
通讯作者:
D. Durban
影响因子:
1.9
作者:
M. Brewster;S. Chapman;A. Fitt;C. Please
通讯作者:
C. Please