TY  - EJOU
AU  - Chen, Zijie 
AU  - Kaviany, Massoud 

TI  - DIRECT SIMULATIONS OF BIPHILIC-SURFACE CONDENSATION:  OPTIMIZED SIZE EFFECTS
T2  - Frontiers in Heat and Mass Transfer

PY  - 2020
VL  - 14
IS  - 1
SN  - 2151-8629

AB  - In dropwise condensation on vertical surface, droplets grow at nucleation sites, coalesce and reach the departing diameter. In biphilic surfaces, when 
the hydrophobic domain is small, the maximum droplet diameter is controlled by the shortest dimension where the droplets merge at the boundary. 
Through direct numerical simulations this size-effect heat transfer coefficient enhancement is calculated. Then the 1-D biphilic surface is optimized 
considering the size-dependent hydrophilic domain partial flooding (directly simulated as a liquid rivulet and using the capillary limit), the subcooling 
(heat flux) and condenser length effects. The predicted performance is in good agreement with the available experiments.
KW  - <i>Dropwise condensation
KW  -  biphilic (hydrophobic-hydrophilic) surface
KW  -  size effect
KW  -  partial flooding
KW  -  heat transfer coefficient enhancement</i>

DO  - 10.5098/hmt.14.1