Drop spreading and evaporation on a heated substrate under variable gravity conditions

Oleg Kabov, Dmitry Zaitsev, Elizaveta Gatapova, Andrey Semenov, Elena Bykovskaya, Ekaterina Karnauhova, Vladimir Sergeevich Ajaev, Dmitriy Vladimirovich Feoktistov, Genii Kuznetsov

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Выдержка

In the last decade, evaporation of sessile drops has become an important subject for research in normal gravity and microgravity conditions. We present results of experimental and theoretical studies of the evaporation of a sessile water drop to open atmosphere when the temperature difference between the solid substrate and the atmosphere is up to 50°C. Using substrates with different wettability (Spin Teflon, Spray Teflon, HMDS, Anodized Aluminum) we investigate all three modes of drop evaporation: pinning, partial pinning and depinning. One of the main results is that at the final stage of the drop life the specific evaporation rate increases abruptly, especially for drops with small and moderate contact angle hysteresis (CAH). The data are compared with two types of models. First one is based on thin layer approximation and valid for drops with small contact angles (CA); the second one is a coupled heat and mass transfer quasi-stationary model valid for any CA. The specific evaporation rate calculated from the second model is in good agreement with the experimental data. We also present experimental and theoretical results on the dynamics of sessile water drops, obtained under normal gravity (1g), microgravity (μg) and hypergravity (up to 20g). The microgravity experiments were conducted during the Parabolic Flight campaigns of the European Space Agency. The hypergravity experiment was carried out on the ESA Large Diameter Centrifuge. The objective was to study the effect of the gravity on 1) the shape of a static sessile drop; 2) the dynamic advancing CA in a growing sessile drop. Eleven different smooth and rough surfaces are used, with different CA and different CAH. Water is used as the working liquid. The main variable parameters are: temperature (20-80°C); gravity (μg-20g); drop volume (1μl-5ml); liquid flow rate (0.06-16 ml/min); CA (30-130°). The drop shape is visualized from the top with the help of the Phase Schlieren System, and from the side with the help of the shadow technique with resolution of 6 μm/pix. The spreading of a sessile liquid drop under the influence of gravity has been observed experimentally on surfaces with low CAH. In this case good agreement is obtained between the experiment and modeling. For surfaces with high CAH the contact line is pinned while CA adjusts for different gravity levels. The dynamic advancing CA is found to increase with the gravity.

Язык оригиналаАнглийский
Название основной публикацииProceedings of the 15th International Heat Transfer Conference, IHTC 2014
ИздательBegell House Inc.
СостояниеОпубликовано - 2014
Событие15th International Heat Transfer Conference, IHTC 2014 - Kyoto, Япония
Продолжительность: 10 авг 201415 авг 2014

Другое

Другое15th International Heat Transfer Conference, IHTC 2014
СтранаЯпония
ГородKyoto
Период10.8.1415.8.14

Отпечаток

Contact angle
Gravitation
Evaporation
evaporation
gravitation
Substrates
Hysteresis
microgravity
Microgravity
hysteresis
high gravity environments
evaporation rate
teflon (trademark)
European Space Agency
Polytetrafluoroethylenes
Liquids
Schlieren systems
parabolic flight
water
atmospheres

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Цитировать

Kabov, O., Zaitsev, D., Gatapova, E., Semenov, A., Bykovskaya, E., Karnauhova, E., ... Kuznetsov, G. (2014). Drop spreading and evaporation on a heated substrate under variable gravity conditions. В Proceedings of the 15th International Heat Transfer Conference, IHTC 2014 Begell House Inc..

Drop spreading and evaporation on a heated substrate under variable gravity conditions. / Kabov, Oleg; Zaitsev, Dmitry; Gatapova, Elizaveta; Semenov, Andrey; Bykovskaya, Elena; Karnauhova, Ekaterina; Ajaev, Vladimir Sergeevich; Feoktistov, Dmitriy Vladimirovich; Kuznetsov, Genii.

Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc., 2014.

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Kabov, O, Zaitsev, D, Gatapova, E, Semenov, A, Bykovskaya, E, Karnauhova, E, Ajaev, VS, Feoktistov, DV & Kuznetsov, G 2014, Drop spreading and evaporation on a heated substrate under variable gravity conditions. в Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc., 15th International Heat Transfer Conference, IHTC 2014, Kyoto, Япония, 10.8.14.
Kabov O, Zaitsev D, Gatapova E, Semenov A, Bykovskaya E, Karnauhova E и соавт. Drop spreading and evaporation on a heated substrate under variable gravity conditions. В Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc. 2014
Kabov, Oleg ; Zaitsev, Dmitry ; Gatapova, Elizaveta ; Semenov, Andrey ; Bykovskaya, Elena ; Karnauhova, Ekaterina ; Ajaev, Vladimir Sergeevich ; Feoktistov, Dmitriy Vladimirovich ; Kuznetsov, Genii. / Drop spreading and evaporation on a heated substrate under variable gravity conditions. Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc., 2014.
@inproceedings{1ac42f9efb744186ad62952716582466,
title = "Drop spreading and evaporation on a heated substrate under variable gravity conditions",
abstract = "In the last decade, evaporation of sessile drops has become an important subject for research in normal gravity and microgravity conditions. We present results of experimental and theoretical studies of the evaporation of a sessile water drop to open atmosphere when the temperature difference between the solid substrate and the atmosphere is up to 50°C. Using substrates with different wettability (Spin Teflon, Spray Teflon, HMDS, Anodized Aluminum) we investigate all three modes of drop evaporation: pinning, partial pinning and depinning. One of the main results is that at the final stage of the drop life the specific evaporation rate increases abruptly, especially for drops with small and moderate contact angle hysteresis (CAH). The data are compared with two types of models. First one is based on thin layer approximation and valid for drops with small contact angles (CA); the second one is a coupled heat and mass transfer quasi-stationary model valid for any CA. The specific evaporation rate calculated from the second model is in good agreement with the experimental data. We also present experimental and theoretical results on the dynamics of sessile water drops, obtained under normal gravity (1g), microgravity (μg) and hypergravity (up to 20g). The microgravity experiments were conducted during the Parabolic Flight campaigns of the European Space Agency. The hypergravity experiment was carried out on the ESA Large Diameter Centrifuge. The objective was to study the effect of the gravity on 1) the shape of a static sessile drop; 2) the dynamic advancing CA in a growing sessile drop. Eleven different smooth and rough surfaces are used, with different CA and different CAH. Water is used as the working liquid. The main variable parameters are: temperature (20-80°C); gravity (μg-20g); drop volume (1μl-5ml); liquid flow rate (0.06-16 ml/min); CA (30-130°). The drop shape is visualized from the top with the help of the Phase Schlieren System, and from the side with the help of the shadow technique with resolution of 6 μm/pix. The spreading of a sessile liquid drop under the influence of gravity has been observed experimentally on surfaces with low CAH. In this case good agreement is obtained between the experiment and modeling. For surfaces with high CAH the contact line is pinned while CA adjusts for different gravity levels. The dynamic advancing CA is found to increase with the gravity.",
keywords = "Boiling and evaporation, Drops dynamics and evaporation, Micro-and hypergravity conditions, Two-phase/Multiphase flows",
author = "Oleg Kabov and Dmitry Zaitsev and Elizaveta Gatapova and Andrey Semenov and Elena Bykovskaya and Ekaterina Karnauhova and Ajaev, {Vladimir Sergeevich} and Dmitriy Vladimirovich Feoktistov and Genii Kuznetsov",
year = "2014",
language = "English",
booktitle = "Proceedings of the 15th International Heat Transfer Conference, IHTC 2014",
publisher = "Begell House Inc.",

}

TY - GEN

T1 - Drop spreading and evaporation on a heated substrate under variable gravity conditions

AU - Kabov, Oleg

AU - Zaitsev, Dmitry

AU - Gatapova, Elizaveta

AU - Semenov, Andrey

AU - Bykovskaya, Elena

AU - Karnauhova, Ekaterina

AU - Ajaev, Vladimir Sergeevich

AU - Feoktistov, Dmitriy Vladimirovich

AU - Kuznetsov, Genii

PY - 2014

Y1 - 2014

N2 - In the last decade, evaporation of sessile drops has become an important subject for research in normal gravity and microgravity conditions. We present results of experimental and theoretical studies of the evaporation of a sessile water drop to open atmosphere when the temperature difference between the solid substrate and the atmosphere is up to 50°C. Using substrates with different wettability (Spin Teflon, Spray Teflon, HMDS, Anodized Aluminum) we investigate all three modes of drop evaporation: pinning, partial pinning and depinning. One of the main results is that at the final stage of the drop life the specific evaporation rate increases abruptly, especially for drops with small and moderate contact angle hysteresis (CAH). The data are compared with two types of models. First one is based on thin layer approximation and valid for drops with small contact angles (CA); the second one is a coupled heat and mass transfer quasi-stationary model valid for any CA. The specific evaporation rate calculated from the second model is in good agreement with the experimental data. We also present experimental and theoretical results on the dynamics of sessile water drops, obtained under normal gravity (1g), microgravity (μg) and hypergravity (up to 20g). The microgravity experiments were conducted during the Parabolic Flight campaigns of the European Space Agency. The hypergravity experiment was carried out on the ESA Large Diameter Centrifuge. The objective was to study the effect of the gravity on 1) the shape of a static sessile drop; 2) the dynamic advancing CA in a growing sessile drop. Eleven different smooth and rough surfaces are used, with different CA and different CAH. Water is used as the working liquid. The main variable parameters are: temperature (20-80°C); gravity (μg-20g); drop volume (1μl-5ml); liquid flow rate (0.06-16 ml/min); CA (30-130°). The drop shape is visualized from the top with the help of the Phase Schlieren System, and from the side with the help of the shadow technique with resolution of 6 μm/pix. The spreading of a sessile liquid drop under the influence of gravity has been observed experimentally on surfaces with low CAH. In this case good agreement is obtained between the experiment and modeling. For surfaces with high CAH the contact line is pinned while CA adjusts for different gravity levels. The dynamic advancing CA is found to increase with the gravity.

AB - In the last decade, evaporation of sessile drops has become an important subject for research in normal gravity and microgravity conditions. We present results of experimental and theoretical studies of the evaporation of a sessile water drop to open atmosphere when the temperature difference between the solid substrate and the atmosphere is up to 50°C. Using substrates with different wettability (Spin Teflon, Spray Teflon, HMDS, Anodized Aluminum) we investigate all three modes of drop evaporation: pinning, partial pinning and depinning. One of the main results is that at the final stage of the drop life the specific evaporation rate increases abruptly, especially for drops with small and moderate contact angle hysteresis (CAH). The data are compared with two types of models. First one is based on thin layer approximation and valid for drops with small contact angles (CA); the second one is a coupled heat and mass transfer quasi-stationary model valid for any CA. The specific evaporation rate calculated from the second model is in good agreement with the experimental data. We also present experimental and theoretical results on the dynamics of sessile water drops, obtained under normal gravity (1g), microgravity (μg) and hypergravity (up to 20g). The microgravity experiments were conducted during the Parabolic Flight campaigns of the European Space Agency. The hypergravity experiment was carried out on the ESA Large Diameter Centrifuge. The objective was to study the effect of the gravity on 1) the shape of a static sessile drop; 2) the dynamic advancing CA in a growing sessile drop. Eleven different smooth and rough surfaces are used, with different CA and different CAH. Water is used as the working liquid. The main variable parameters are: temperature (20-80°C); gravity (μg-20g); drop volume (1μl-5ml); liquid flow rate (0.06-16 ml/min); CA (30-130°). The drop shape is visualized from the top with the help of the Phase Schlieren System, and from the side with the help of the shadow technique with resolution of 6 μm/pix. The spreading of a sessile liquid drop under the influence of gravity has been observed experimentally on surfaces with low CAH. In this case good agreement is obtained between the experiment and modeling. For surfaces with high CAH the contact line is pinned while CA adjusts for different gravity levels. The dynamic advancing CA is found to increase with the gravity.

KW - Boiling and evaporation

KW - Drops dynamics and evaporation

KW - Micro-and hypergravity conditions

KW - Two-phase/Multiphase flows

UR - http://www.scopus.com/inward/record.url?scp=84964522865&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84964522865&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84964522865

BT - Proceedings of the 15th International Heat Transfer Conference, IHTC 2014

PB - Begell House Inc.

ER -