Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence
Nano-fluid flooding is a new method capable of improving oil recovery; however, nanoparticles (NPs) significantly affect electric dehydration, which has rarely been investigated. The effect of silica (SiO<sub>2</sub>) NPs on the droplet–interface coalescence was investigated using a high...
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| Format: | Article |
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MDPI AG
2021-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/7/1764 |
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| author | Donghai Yang Huayao Sun Qing Chang Yongxiang Sun Limin He |
| author_facet | Donghai Yang Huayao Sun Qing Chang Yongxiang Sun Limin He |
| author_sort | Donghai Yang |
| collection | DOAJ |
| description | Nano-fluid flooding is a new method capable of improving oil recovery; however, nanoparticles (NPs) significantly affect electric dehydration, which has rarely been investigated. The effect of silica (SiO<sub>2</sub>) NPs on the droplet–interface coalescence was investigated using a high-speed digital camera under an electric field. The droplet experienced a fall, coalescence, and secondary droplet formation. The results revealed that the oil–water interfacial tension and water conductivity changed because of the SiO<sub>2</sub> NPs. The decrease of interfacial tension facilitated droplet deformation during the falling process. However, with the increase of particle concentration, the formed particle film inhibited the droplet deformation degree. Droplet and interface are connected by a liquid bridge during coalescence, and the NP concentration also resulted in the shape of this liquid bridge changing. The increase of NP concentration inhibited the horizontal contraction of the liquid bridge while promoting vertical collapse. As a result, it did not facilitate secondary droplet formation. Moreover, the droplet falling velocity decreased, while the rising velocity of the secondary droplet increased. Additionally, the inverse calculation of the force balance equation showed that the charge of the secondary droplet also increased. This is attributed to nanoparticle accumulation, which resulted in charge accumulation on the top of the droplet. |
| first_indexed | 2024-03-10T09:31:03Z |
| format | Article |
| id | doaj.art-fd86bccb88df44f1bcaf305acfaa8afe |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T09:31:03Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-fd86bccb88df44f1bcaf305acfaa8afe2023-11-22T04:33:33ZengMDPI AGNanomaterials2079-49912021-07-01117176410.3390/nano11071764Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-CoalescenceDonghai Yang0Huayao Sun1Qing Chang2Yongxiang Sun3Limin He4College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaChina Petroleum Pipeline Engineering Corporation Shanghai Branch, Shanghai 200127, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, ChinaNano-fluid flooding is a new method capable of improving oil recovery; however, nanoparticles (NPs) significantly affect electric dehydration, which has rarely been investigated. The effect of silica (SiO<sub>2</sub>) NPs on the droplet–interface coalescence was investigated using a high-speed digital camera under an electric field. The droplet experienced a fall, coalescence, and secondary droplet formation. The results revealed that the oil–water interfacial tension and water conductivity changed because of the SiO<sub>2</sub> NPs. The decrease of interfacial tension facilitated droplet deformation during the falling process. However, with the increase of particle concentration, the formed particle film inhibited the droplet deformation degree. Droplet and interface are connected by a liquid bridge during coalescence, and the NP concentration also resulted in the shape of this liquid bridge changing. The increase of NP concentration inhibited the horizontal contraction of the liquid bridge while promoting vertical collapse. As a result, it did not facilitate secondary droplet formation. Moreover, the droplet falling velocity decreased, while the rising velocity of the secondary droplet increased. Additionally, the inverse calculation of the force balance equation showed that the charge of the secondary droplet also increased. This is attributed to nanoparticle accumulation, which resulted in charge accumulation on the top of the droplet.https://www.mdpi.com/2079-4991/11/7/1764electro-coalescencenanoparticledropletinterfacial tensionconductivity |
| spellingShingle | Donghai Yang Huayao Sun Qing Chang Yongxiang Sun Limin He Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence Nanomaterials electro-coalescence nanoparticle droplet interfacial tension conductivity |
| title | Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence |
| title_full | Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence |
| title_fullStr | Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence |
| title_full_unstemmed | Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence |
| title_short | Study on the Effect of Nanoparticle Used in Nano-Fluid Flooding on Droplet–Interface Electro-Coalescence |
| title_sort | study on the effect of nanoparticle used in nano fluid flooding on droplet interface electro coalescence |
| topic | electro-coalescence nanoparticle droplet interfacial tension conductivity |
| url | https://www.mdpi.com/2079-4991/11/7/1764 |
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