Application of the augmented Lagrangian method to steady pipe flows of Bingham, Casson and Herschel–Bulkley fluids

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• 作者：R.R. Huilgol and Z. You
• 关键词：Augmented Lagrangian method ; Pipe flows ; Bingham model ; Casson model ; Herschel– ; Bulkley model ; Viscoplastic fluids ; Variational inequalities
• 刊名：Journal of Non-Newtonian Fluid Mechanics
• 出版年：2005
• 期刊代码：103_03770257
• 类别：et
• 出版时间：2005
• 卷：128
• 期：2-3
• 页码：126-143
• 文件大小：829 K

摘要

The augmented Lagrangian method is applied to the steady flow problems of Bingham, Casson and Herschel–Bulkley fluids in pipes of circular and square cross-sections. The plug flow velocity, the flow rate, the flow pattern, the velocity profile, the locations of yielded/unyielded surfaces, the stopping criteria and the friction factor are presented and compared with one another. The numerical strategy based on variational inequalities is shown to be realised easily and applicable extensively.