P24 - Effects of Surface Functionalization on Convective Heat Transfer
- Event
- iCCC2026 - iCampus Cottbus Conference
2026-05-05 - 2026-05-07
Cottbus - Band
- Poster
- Chapter
- Energiewirtschaft
- Author(s)
- S. R. G. Polasanapalli, M. Klein, H. Schmidt - BTU Cottbus-Senftenberg, Cottbus
- Pages
- 216 - 219
- DOI
- 10.5162/iCCC2026/P24
- ISBN
- 978-3-910600-10-2
- Price
- free
Abstract
This study investigates how wall surface properties affect fluid motion and heat transfer in an idealized natural convection setup. Natural convection in a cubic box with a heated bottom wall and a cooled top wall is used as a simplified setup to analyze heating and cooling efficiency for regular (no-slip), free-slip, and coated (finite-slip) walls. Using a three-dimensional lattice Boltzmann method (LBM) solver in direct numerical simulation (DNS) mode, simulations are performed for three Prandtl numbers Pr = 0.786, 4.38, and 10, and two Rayleigh numbers Ra = 2 × 10 6, and 10⁷. The aim is to understand how surface conditions influence flow patterns, thermal mixing, and heat transfer efficiency. Results show that free-slip conditions significantly enhance heat transfer, yielding higher Nusselt numbers due to thinner thermal boundary layers and stronger convective currents. The results demonstrate that surface boundary conditions play a role in modulating flow dynamics and heat transfer in RB convection.