Velocity Measurement in the Startup Flow of Viscoelastic Fluids through Contraction with Rectangular Cross-Section
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- MORI Noriyasu
- Department of Mechanical Engineering, Osaka University
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- KAIGE Takumi
- Department of Mechanical Engineering, Osaka University
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- NAKAMURA Kiyoji
- Department of Mechanical Engineering, Osaka University
Bibliographic Information
- Other Title
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- 絞り部を有する矩形管流路内における粘弾性流体のスタートアップ流れの流速測定
- シボリブ オ ユウスル クケイカン リュウロナイ ニ オケル ネンダンセイ リ
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Abstract
The unsteady viscoelastic flow generated by the sudden application of a constant flow rate is experimentally examined for an abrupt contraction and a tapered one with a rectangular cross-section. The velocity change with time is measured with a L. D. V. for a 1.0 wt% aqueous solution of polyacrylamide. The gentle overshoot in the centerline velocity, which may be due to the effect of extensional flow, is observed from the vicinity of the entrance of a small slit to the downstream far from the entrance. Furthermore it is found that the flow in the entrance region finally reaches the anomalous threedimensional flow with a dual peak form of the velocity profile.
Journal
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- Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)
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Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan) 21 (1), 33-40, 1993
The Society of Rheology, Japan
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Details 詳細情報について
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- CRID
- 1390282680444258304
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- NII Article ID
- 130004661899
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- NII Book ID
- AN00198812
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- COI
- 1:CAS:528:DyaK3sXktFWiu7c%3D
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- NDL BIB ID
- 3803947
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- ISSN
- 03871533
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed