Thermohydrodynamics of an evaporating droplet studied using a multiphase lattice Boltzmann method

Thermohydrodynamics of an evaporating droplet studied using a multiphase lattice Boltzmann method

Zarghami, A. (TU Delft Intensified Reaction and Separation Systems)
van den Akker, H.E.A. (TU Delft ChemE/Transport Phenomena; University of Limerick)

2017

In this paper, the thermohydrodynamics of an evaporating droplet is investigated by using a single-component pseudopotential lattice Boltzmann model. The phase change is applied to the model by adding source terms to the thermal lattice Boltzmann equation in such a way that the macroscopic energy equation of multiphase flows is recovered. In order to gain an exhaustive understanding of the complex hydrodynamics during evaporation, a single droplet is selected as a case study. At first, some tests for a stationary (non-)evaporating droplet are carried out to validate the method. Then the model is used to study the thermohydrodynamics of a falling evaporating droplet. The results show that the model is capable of reproducing the flow dynamics and transport phenomena of a stationary evaporating droplet quite well. Of course, a moving droplet evaporates faster than a stationary one due to the convective transport. Our study shows that our single-component model for simulating a moving evaporating droplet is limited to low Reynolds numbers.

http://resolver.tudelft.nl/uuid:0a0bb6aa-cc7f-4c60-af9a-dfd84476ec7f

https://doi.org/10.1103/PhysRevE.95.043310

1539-3755

Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), 95 (4)

Institutional Repository

journal article

© 2017 A. Zarghami, H.E.A. van den Akker