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Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method
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| Zeitschriftentitel: | Polymers |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Polymers, 11, 2019, 4, S. 596 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
MDPI AG
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| Schlagwörter: |
| author_facet |
Wang, Yi Wang, Yan Cheng, Zhe Wang, Yi Wang, Yan Cheng, Zhe |
|---|---|
| author |
Wang, Yi Wang, Yan Cheng, Zhe |
| spellingShingle |
Wang, Yi Wang, Yan Cheng, Zhe Polymers Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method Polymers and Plastics General Chemistry |
| author_sort |
wang, yi |
| spelling |
Wang, Yi Wang, Yan Cheng, Zhe 2073-4360 MDPI AG Polymers and Plastics General Chemistry http://dx.doi.org/10.3390/polym11040596 <jats:p>Drag reduction by polymer is an important energy-saving technology, which can reduce pumping pressure or promote the flow rate of the pipelines transporting fluid. It has been widely applied to single-phase pipelines, such as oil pipelining, district heating systems, and firefighting. However, the engineering application of the drag reduction technology in two-phase flow systems has not been reported. The reason is an unrevealed complex mechanism of two-phase drag reduction and lack of numerical tools for mechanism study. Therefore, we aim to propose governing equations and numerical methods of direct numerical simulation (DNS) for two-phase gas-liquid drag-reducing flow and try to explain the reason for the two-phase drag reduction. Efficient interface tracking method—coupled volume-of-fluid and level set (VOSET) and typical polymer constitutive model Giesekus are combined in the momentum equation of the two-phase turbulent flow. Interface smoothing for conformation tensor induced by polymer is used to ensure numerical stability of the DNS. Special features and corresponding explanations of the two-phase gas-liquid drag-reducing flow are found based on DNS results. High shear in a high Reynolds number flow depresses the efficiency of the gas-liquid drag reduction, while a high concentration of polymer promotes the efficiency. To guarantee efficient drag reduction, it is better to use a high concentration of polymer drag-reducing agents (DRAs) for high shear flow.</jats:p> Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method Polymers |
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| title |
Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_unstemmed |
Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_full |
Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_fullStr |
Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_full_unstemmed |
Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_short |
Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_sort |
direct numerical simulation of gas-liquid drag-reducing cavity flow by the voset method |
| topic |
Polymers and Plastics General Chemistry |
| url |
http://dx.doi.org/10.3390/polym11040596 |
| publishDate |
2019 |
| physical |
596 |
| description |
<jats:p>Drag reduction by polymer is an important energy-saving technology, which can reduce pumping pressure or promote the flow rate of the pipelines transporting fluid. It has been widely applied to single-phase pipelines, such as oil pipelining, district heating systems, and firefighting. However, the engineering application of the drag reduction technology in two-phase flow systems has not been reported. The reason is an unrevealed complex mechanism of two-phase drag reduction and lack of numerical tools for mechanism study. Therefore, we aim to propose governing equations and numerical methods of direct numerical simulation (DNS) for two-phase gas-liquid drag-reducing flow and try to explain the reason for the two-phase drag reduction. Efficient interface tracking method—coupled volume-of-fluid and level set (VOSET) and typical polymer constitutive model Giesekus are combined in the momentum equation of the two-phase turbulent flow. Interface smoothing for conformation tensor induced by polymer is used to ensure numerical stability of the DNS. Special features and corresponding explanations of the two-phase gas-liquid drag-reducing flow are found based on DNS results. High shear in a high Reynolds number flow depresses the efficiency of the gas-liquid drag reduction, while a high concentration of polymer promotes the efficiency. To guarantee efficient drag reduction, it is better to use a high concentration of polymer drag-reducing agents (DRAs) for high shear flow.</jats:p> |
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| author | Wang, Yi, Wang, Yan, Cheng, Zhe |
| author_facet | Wang, Yi, Wang, Yan, Cheng, Zhe, Wang, Yi, Wang, Yan, Cheng, Zhe |
| author_sort | wang, yi |
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| description | <jats:p>Drag reduction by polymer is an important energy-saving technology, which can reduce pumping pressure or promote the flow rate of the pipelines transporting fluid. It has been widely applied to single-phase pipelines, such as oil pipelining, district heating systems, and firefighting. However, the engineering application of the drag reduction technology in two-phase flow systems has not been reported. The reason is an unrevealed complex mechanism of two-phase drag reduction and lack of numerical tools for mechanism study. Therefore, we aim to propose governing equations and numerical methods of direct numerical simulation (DNS) for two-phase gas-liquid drag-reducing flow and try to explain the reason for the two-phase drag reduction. Efficient interface tracking method—coupled volume-of-fluid and level set (VOSET) and typical polymer constitutive model Giesekus are combined in the momentum equation of the two-phase turbulent flow. Interface smoothing for conformation tensor induced by polymer is used to ensure numerical stability of the DNS. Special features and corresponding explanations of the two-phase gas-liquid drag-reducing flow are found based on DNS results. High shear in a high Reynolds number flow depresses the efficiency of the gas-liquid drag reduction, while a high concentration of polymer promotes the efficiency. To guarantee efficient drag reduction, it is better to use a high concentration of polymer drag-reducing agents (DRAs) for high shear flow.</jats:p> |
| doi_str_mv | 10.3390/polym11040596 |
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| imprint | MDPI AG, 2019 |
| imprint_str_mv | MDPI AG, 2019 |
| institution | DE-Zi4, DE-Gla1, DE-15, DE-Pl11, DE-Rs1, DE-14, DE-105, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161 |
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| physical | 596 |
| publishDate | 2019 |
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| publisher | MDPI AG |
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| series | Polymers |
| source_id | 49 |
| spelling | Wang, Yi Wang, Yan Cheng, Zhe 2073-4360 MDPI AG Polymers and Plastics General Chemistry http://dx.doi.org/10.3390/polym11040596 <jats:p>Drag reduction by polymer is an important energy-saving technology, which can reduce pumping pressure or promote the flow rate of the pipelines transporting fluid. It has been widely applied to single-phase pipelines, such as oil pipelining, district heating systems, and firefighting. However, the engineering application of the drag reduction technology in two-phase flow systems has not been reported. The reason is an unrevealed complex mechanism of two-phase drag reduction and lack of numerical tools for mechanism study. Therefore, we aim to propose governing equations and numerical methods of direct numerical simulation (DNS) for two-phase gas-liquid drag-reducing flow and try to explain the reason for the two-phase drag reduction. Efficient interface tracking method—coupled volume-of-fluid and level set (VOSET) and typical polymer constitutive model Giesekus are combined in the momentum equation of the two-phase turbulent flow. Interface smoothing for conformation tensor induced by polymer is used to ensure numerical stability of the DNS. Special features and corresponding explanations of the two-phase gas-liquid drag-reducing flow are found based on DNS results. High shear in a high Reynolds number flow depresses the efficiency of the gas-liquid drag reduction, while a high concentration of polymer promotes the efficiency. To guarantee efficient drag reduction, it is better to use a high concentration of polymer drag-reducing agents (DRAs) for high shear flow.</jats:p> Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method Polymers |
| spellingShingle | Wang, Yi, Wang, Yan, Cheng, Zhe, Polymers, Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method, Polymers and Plastics, General Chemistry |
| title | Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_full | Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_fullStr | Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_full_unstemmed | Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_short | Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| title_sort | direct numerical simulation of gas-liquid drag-reducing cavity flow by the voset method |
| title_unstemmed | Direct Numerical Simulation of Gas-Liquid Drag-Reducing Cavity Flow by the VOSET Method |
| topic | Polymers and Plastics, General Chemistry |
| url | http://dx.doi.org/10.3390/polym11040596 |