Dynamics behaviour of impacting water droplets on an inclined moving surface
The droplet impact dynamics have been extensively studied for centuries due to numerous industrial applications such as spray cooling and anti-icing on wind turbines. However, the droplet dynamic behaviours on a moving inclined surface have not been reported. Hence, this present study investigates t...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
Nanyang Technological University
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/157507 |
| _version_ | 1826121938288771072 |
|---|---|
| author | Ong, Yee Ming |
| author2 | Charles Yang Chun |
| author_facet | Charles Yang Chun Ong, Yee Ming |
| author_sort | Ong, Yee Ming |
| collection | NTU |
| description | The droplet impact dynamics have been extensively studied for centuries due to numerous industrial applications such as spray cooling and anti-icing on wind turbines. However, the droplet dynamic behaviours on a moving inclined surface have not been reported. Hence, this present study investigates the effect of various surface inclination and tangential velocities on a hydrophilic surface. Range of tangential velocities from 0 to 1.75 m/s and surface inclination of 0°, 30°,45°, and 60° were used in the experiment. The impingement process was captured with a digital high-speed camera (Phantom V711) and ImageJ software was used to process the videos frame by frame for analysis purposes.
Thereafter, phenomenological observations and quantitative results in terms of maximum spreading factor Smax were presented. It was found that in the lower speed region, a higher inclination angle has the ability to reach larger Smax and vice versa. Furthermore, unique phenomena were observed at specific conditions: (a) For 45° inclination angle, the partial rebound of the droplet is observed for tangential We ≥ 35. (b) For 60° inclination angle at tangential We = 0, the droplet undergoes receding breakup and forms a secondary droplet due to extreme thinning of the liquid film. |
| first_indexed | 2024-10-01T05:40:20Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/157507 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:40:20Z |
| publishDate | 2022 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1575072023-03-04T20:16:11Z Dynamics behaviour of impacting water droplets on an inclined moving surface Ong, Yee Ming Charles Yang Chun School of Mechanical and Aerospace Engineering MCYang@ntu.edu.sg Engineering::Mechanical engineering::Fluid mechanics The droplet impact dynamics have been extensively studied for centuries due to numerous industrial applications such as spray cooling and anti-icing on wind turbines. However, the droplet dynamic behaviours on a moving inclined surface have not been reported. Hence, this present study investigates the effect of various surface inclination and tangential velocities on a hydrophilic surface. Range of tangential velocities from 0 to 1.75 m/s and surface inclination of 0°, 30°,45°, and 60° were used in the experiment. The impingement process was captured with a digital high-speed camera (Phantom V711) and ImageJ software was used to process the videos frame by frame for analysis purposes. Thereafter, phenomenological observations and quantitative results in terms of maximum spreading factor Smax were presented. It was found that in the lower speed region, a higher inclination angle has the ability to reach larger Smax and vice versa. Furthermore, unique phenomena were observed at specific conditions: (a) For 45° inclination angle, the partial rebound of the droplet is observed for tangential We ≥ 35. (b) For 60° inclination angle at tangential We = 0, the droplet undergoes receding breakup and forms a secondary droplet due to extreme thinning of the liquid film. Bachelor of Engineering (Mechanical Engineering) 2022-05-19T04:39:27Z 2022-05-19T04:39:27Z 2022 Final Year Project (FYP) Ong, Y. M. (2022). Dynamics behaviour of impacting water droplets on an inclined moving surface. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/157507 https://hdl.handle.net/10356/157507 en B250 application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Mechanical engineering::Fluid mechanics Ong, Yee Ming Dynamics behaviour of impacting water droplets on an inclined moving surface |
| title | Dynamics behaviour of impacting water droplets on an inclined moving surface |
| title_full | Dynamics behaviour of impacting water droplets on an inclined moving surface |
| title_fullStr | Dynamics behaviour of impacting water droplets on an inclined moving surface |
| title_full_unstemmed | Dynamics behaviour of impacting water droplets on an inclined moving surface |
| title_short | Dynamics behaviour of impacting water droplets on an inclined moving surface |
| title_sort | dynamics behaviour of impacting water droplets on an inclined moving surface |
| topic | Engineering::Mechanical engineering::Fluid mechanics |
| url | https://hdl.handle.net/10356/157507 |
| work_keys_str_mv | AT ongyeeming dynamicsbehaviourofimpactingwaterdropletsonaninclinedmovingsurface |