Marangoni convection and evaporative heat transfer in a sessile droplet considering local heating method
Document Type
Conference Proceeding
Publication Date
2023
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
The present study numerically analyzes the Marangoni convection and heat transfer characteristics of the droplet. The dynamic behavior of the liquid-air interface of the evaporating droplet was considered using the dynamic mesh model. The uniform and local heating conditions were examined to control the internal flow motion of the droplet. From the results, the flow transition inside the droplet was observed at the early stage of the evaporation due to the temperature variation of the liquid-air interface, causing a surface tension gradient. The non-uniform evaporation flux caused capillary flow, which moves from the center of the droplet to the contact line region along the substrate. Also, the surface tension gradient had a dominant effect in inducing the thermal Marangoni flow. Moreover, the local heating conditions showed different flow directions compared to that of uniform heating, meaning it is possible to control the internal flow using local heating.
Publication Title
10th International Symposium on Turbulence, Heat and Mass Transfer, THMT-23, Rome, Italy, 11-15 September 2023
ISBN
978-1-56700-535-6
Recommended Citation
Lee, H.,
Ryu, H.,
Choi, C.,
&
Lee, S.
(2023).
Marangoni convection and evaporative heat transfer in a sessile droplet considering local heating method.
10th International Symposium on Turbulence, Heat and Mass Transfer, THMT-23, Rome, Italy, 11-15 September 2023.
http://doi.org/10.1615/thmt-23.1470
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p2/1488
