Abstract
Direct numerical simulation (DNS) with high-order compact scheme (Incompact3d) is used for simulating a jet in cross flow (JICF) with passive scalar mixing and wall heat transfer. The low momentum laminar circular jet is orthogonal to the walls of a turbulent channel flow generated using recycling technology. Instantaneous and time-averaged profiles from DNS confirm important dynamic flow structures of JICF, including the shear layer vortices, horseshoe vortex formation, the 3D near-wall back-flow after the jet, and the formation of counter-rotating vortex pair. Four different Reynolds Averaged Navier Stokes (RANS) models are also tested for the JICF in comparison to the DNS data. The velocity and temperature predictions from all RANS models are found to produce only qualitative agreement with the DNS, however the predictions of kinetic energy and wall heat transfer produced by all four RANS models are unsatisfactory. Wall temperature fluctuation variance from the DNS is also presented.
| Original language | British English |
|---|---|
| Pages (from-to) | 443-446 |
| Number of pages | 4 |
| Journal | Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer |
| Volume | 0 |
| State | Published - 2015 |
| Event | 8th International Symposium on Turbulence, Heat and Mass Transfer, THMT 2015 - Sarajevo, Bosnia and Herzegovina Duration: 15 Sep 2015 → 18 Sep 2015 |
