ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS
Research review of phenomenon for slip flow in micro and nanocannels is presented in the paper. The analysis of theoretical and experimental data characterizing the slip length is carried out. In slip flow in microchannels the slip length is affected by the contact angle of the liquid with the surfa...
Збережено в:
| Дата: | 2018 |
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| Автор: | |
| Формат: | Стаття |
| Мова: | Russian |
| Опубліковано: |
Institute of Engineering Thermophysics of NAS of Ukraine
2018
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| Онлайн доступ: | https://ihe.nas.gov.ua/index.php/journal/article/view/283 |
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| Назва журналу: | Thermophysics and Thermal Power Engineering |
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Thermophysics and Thermal Power Engineering| id |
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oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-2832018-12-14T18:58:03Z ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS ОЦЕНКА ДЛИНЫ ПРОСКАЛЬЗЫВАНИЯ ПРИ ТЕЧЕНИИ ЖИДКОСТИ В МИКРОКАНАЛАХ Kovetska, Y.Y. Research review of phenomenon for slip flow in micro and nanocannels is presented in the paper. The analysis of theoretical and experimental data characterizing the slip length is carried out. In slip flow in microchannels the slip length is affected by the contact angle of the liquid with the surface, shear stress, pressure, dissipative heating, the amount and nature of the dissolved gas in the liquid, electrical characteristics, surface roughness. Studies of flow in microchannels with hydrophobic walls, which are based on molecular dynamics, showed that the slip length has order of 20 nm. This is much less than the values observed in the experiment. The introduction of an effective (apparent) slip length suggests the existence of a thin layer of gas bubbles near the hydrophobic surface or liquid layer with low value of viscosity and density. Since the idealized model for the total coverage of a hydrophobic surface by gas bubbles gives, as a rule, overestimated values of the slip length in comparison with experimental ones, some researchers consider the inhomogeneous coating of the wall by gas bubbles. In this case, the effect of a layer with a lower viscosity on the slip length turns out to be weaker. Представлено огляд досліджень явища проковзування при перебігу рідини в мікро і наноканалах. Проведено аналіз теоретичних і експериментальних даних, що характеризують довжину ковзання. Показано, що значення довжини проковзування на стінках канала залежить від характерних розмірів каналу, хімічних і фізичних параметрів стінки і рідини. Institute of Engineering Thermophysics of NAS of Ukraine 2018-06-20 Article Article application/pdf https://ihe.nas.gov.ua/index.php/journal/article/view/283 10.31472/ihe.2.2018.02 Thermophysics and Thermal Power Engineering; Vol 40 No 2 (2018): Industrial Heat Engineering; 12-19 Теплофизика и Теплоэнергетика; Vol 40 No 2 (2018): Industrial Heat Engineering; 12-19 Теплофізика та Теплоенергетика; Vol 40 No 2 (2018): Industrial Heat Engineering; 12-19 2663-7235 ru https://ihe.nas.gov.ua/index.php/journal/article/view/283/227 Copyright (c) 2018 Industrial Heat Engineering http://creativecommons.org/licenses/by/4.0 |
| institution |
Thermophysics and Thermal Power Engineering |
| baseUrl_str |
|
| datestamp_date |
2018-12-14T18:58:03Z |
| collection |
OJS |
| language |
Russian |
| format |
Article |
| author |
Kovetska, Y.Y. |
| spellingShingle |
Kovetska, Y.Y. ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS |
| author_facet |
Kovetska, Y.Y. |
| author_sort |
Kovetska, Y.Y. |
| title |
ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS |
| title_short |
ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS |
| title_full |
ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS |
| title_fullStr |
ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS |
| title_full_unstemmed |
ESTIMATION OF THE SLIP LENGTH IN THE FLOW OF LIQUID IN MICRO-CHANNELS |
| title_sort |
estimation of the slip length in the flow of liquid in micro-channels |
| title_alt |
ОЦЕНКА ДЛИНЫ ПРОСКАЛЬЗЫВАНИЯ ПРИ ТЕЧЕНИИ ЖИДКОСТИ В МИКРОКАНАЛАХ |
| description |
Research review of phenomenon for slip flow in micro and nanocannels is presented in the paper. The analysis of theoretical and experimental data characterizing the slip length is carried out. In slip flow in microchannels the slip length is affected by the contact angle of the liquid with the surface, shear stress, pressure, dissipative heating, the amount and nature of the dissolved gas in the liquid, electrical characteristics, surface roughness. Studies of flow in microchannels with hydrophobic walls, which are based on molecular dynamics, showed that the slip length has order of 20 nm. This is much less than the values observed in the experiment. The introduction of an effective (apparent) slip length suggests the existence of a thin layer of gas bubbles near the hydrophobic surface or liquid layer with low value of viscosity and density. Since the idealized model for the total coverage of a hydrophobic surface by gas bubbles gives, as a rule, overestimated values of the slip length in comparison with experimental ones, some researchers consider the inhomogeneous coating of the wall by gas bubbles. In this case, the effect of a layer with a lower viscosity on the slip length turns out to be weaker. |
| publisher |
Institute of Engineering Thermophysics of NAS of Ukraine |
| publishDate |
2018 |
| url |
https://ihe.nas.gov.ua/index.php/journal/article/view/283 |
| work_keys_str_mv |
AT kovetskayy estimationofthesliplengthintheflowofliquidinmicrochannels AT kovetskayy ocenkadlinyproskalʹzyvaniâpritečeniižidkostivmikrokanalah |
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2025-12-17T13:55:10Z |
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2025-12-17T13:55:10Z |
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1851763940754718720 |