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Hybrid simulations for the mechanical degradation of polymer solution by turbulence

Hybrid simulations for the mechanical degradation of polymer solution by turbulence
湍流引起的聚合物溶液机械降解的混合模拟
批准号:
23760156
负责人:
WATANABE Takeshi
金额:
$2.5万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Young Scientists (B)
财政年份:
2011
资助国家:
日本
项目状态:
已结题
起止时间:
2011 至 2013

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中文摘要
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英文摘要
In this study we examined the mechanical degradation of polymer solution by turbulence and its effects on turbulence statistics by performing the numerical simulations which include the cut-off process of long-chain polymers. It is known that the kinetic energy dissipation of turbulent flows is reduced by polymer additives. It was found that the longer chain polymers have larger influence on the turbulence statistics like the kinetic energy dissipation. When the elasticity of polymers was much stronger, turbulent motions were maintained by stretching polymers even when the turbulence sufficiently decayed. Then the kinetic energy spectrum showed the characteristic power-law decay in the wavenumber range below the Kolmogorov scale. We also found that the reduction rate of the kinetic energy dissipation was gradually decreased with time due to the decreasing of the number of longer chain polymers by cutting.
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多数の高分子モデルが分散した一様乱流の統計性
多种分布式聚合物模型的均匀湍流统计
DOI: --
发表时间: 2011
期刊: 第24回計算力学講演会CMD2011
影响因子: --
作者: [米澤宏一, 小西大介, 宮川和芳, Peter Doerfler, Francois Avellan, 辻本良信, 杉本大輝,渡邊威,後藤俊幸]
通讯作者: 杉本大輝,渡邊威,後藤俊幸
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者: [Takeshi Watanabe, Toshiyuki Gotoh]
通讯作者: Toshiyuki Gotoh
乱流の減衰過程に及ぼす高分子の影響
聚合物对湍流衰减过程的影响
DOI: --
发表时间: 2014
期刊: 京都大学数理解析研究所講究録
影响因子: --
作者: [米澤宏一, 青野淳, 姜東赫, 堀口祐憲, 川田裕, 辻本良信, 渡邊威,後藤俊幸]
通讯作者: 渡邊威,後藤俊幸
DOI: --
发表时间: 2013
期刊: J. Phys. : Conf. Ser
影响因子: --
作者: [Koichi Yonezawa, Jun Aono, Donghyuk Kang, Hironori Horiguchi, Yutaka Kawata, Yoshinobu Tsujimoto, Takeshi Watanabe and Toshiyuki Gotoh]
通讯作者: Takeshi Watanabe and Toshiyuki Gotoh
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