可视化流动动力学和重新启动Carbopol凝溶液的管和平行板几何形状与墙壁滑动
Angel De J Rivera1, Yamid J Garcia-Blanco1, Luis H Quitian-Ardila1
1Academic Department of Mechanics - DAMEC, Postgraduate Program in Mechanical and Materials Engineering - PPGEM, Research Center for Rheology and Non-Newtonian Fluids - CERNN, Federal University of Technology - Paraná - UTFPR, R. Deputado Heitor Alencar Furtado, 5000 - Bloco N - Ecoville, 81280-340 Curitiba, PR, Brazil. angeljimenez@alunos.utfpr.edu.br.
Soft matter
|July 18, 2024
概括
这项研究量化了在管道重新启动流程期间卡尔博波尔溶液中的墙壁滑动. 了解滑动效应,比如61%的重启压力下降,对于运输产量应力流体至关重要.
科学领域:
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
- 类风病学 类风病学 类风病学
背景情况:
- 像卡博波尔溶液这样的承压液体表现出复杂的流动行为.
- 墙壁滑动对这些材料在管道中的重新启动流动力学产生重大影响.
- 精确的滑动特征对于高效的工业运输至关重要.
研究的目的:
- 为了调查和量化墙壁滑动对Carbopol溶液在管道重新启动流程期间的影响.
- 为了确定滑动现象和风湿学性质之间的相关性.
- 为优化输出应力流体管道运输系统的设计和管理提供数据.
主要方法:
- 利用现场可视化技术直接观察流动.
- 进行了与平滑和化平行板几何形状的风湿学试验.
- 进行了爬行测试,并将结果与实验管道流量数据进行了比较.
主要成果:
- 确定了三种流量模式:非流量,滑动和产量.
- 量化了一种滑动静态屈服应力和由于滑动而导致重启压力的61%降低.
- 确定过时缩放规律的相关性,显示滑动与速度梯度和墙壁剪切应力成比例.
- 观察到,粘性塑料材料度增加会提高缩放规律指数.
结论:
- 墙壁滑动显著降低了产量应力流体管道的重新启动压力.
- 现场测量为理解和建模滑动效应提供了关键数据.
- 这些发现对于运输化品,食品和油的行业至关重要.
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