Periodic Reporting for period 1 - ENMMCL (Efficient Numerical Modeling of Moving Contact Lines under Non-isothermal Conditions)
Reporting period: 2015-10-06 to 2017-10-05
(1) to investigate the dependency of the dynamic contact angle on the contact line speed and other system parameters using systematic experiments, and to develop fundamental understandings of the results
(2) to develop a non-isothermal theory to predict the interface shape close to the MCL
(3) to develop a novel macroscale computational model for efficient simulations of non-isothermal MCL flows and to validate the model
All three research objectives have been achieved during the fellowship period.
(1)The fellow studied the theories of MCL (Molecular Kinetic Theory, Hydrodynamic Theory, Combined Theory) under non-isothermal conditions, and revealed the dependency of the dynamic contact angle on the contact line speed and other system parameters.
(2) The fellow carried out the experiment on droplet spreading on hot substrate and revealed the effect of substrate temperature on the droplet spreading. The thermal effect on droplet spreading regimes (first-stage pinch-off, second-stage pinch-off, no pinch-off) is revealed.
(3) Based on the theories of MCL, the macro-scale computational model was built up to describe accurately the droplet spreading under non-isothermal conditions after validation with experimental results.
(4) The evaporation model was built up for droplet evaporation on hot substrate, which agreed quite well with the theoretical solutions.
The results from the project are currently being summarized into six journal papers. During the project, the fellow attended the 2nd International Heat Transfer Symposium in 2016 to disseminate the research results, which have received wide attention from the international peers.