Reyes-Rondon, Amabel

Profile Picture

Filters

20111
Reset filters

Settings

Citations

Publication Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Publication
    Heat transfer in turbulent channel flow with roughness on the walls: numerical simulation
    (2011-12) Reyes-Rondon, Amabel; Cancelos, Silvina; College of Engineering; Leonardi, Stefano; Pandya, Vikram R.; Department of Mechanical Engineering; Acevedo, Aldo
    Reynolds Average Navier Stokes (RANS) simulations are performed to study a turbulent channel flow with different roughness on the lower and upper walls. Several roughness were used. Square Bars, V-shaped and segmented V-shaped with a p/e ratio equal to 1, 3, 5, 8, 10 and 15, where e is the bar height and p is the longitudinal separation between consecutive bars. The height of the turbulators was choose e/H = 0.25, where H is the channel half-height. The V-shaped and segmented V-shaped turbulators have an inclination angle with respect to the flow direction of 45â—¦. For the segmented V-shaped turbulators case the used gap size was G/H = 0.2 (where G is the width of the space in the middle of the ribs). The different types of roughness analyzed showed the most efficient cases for each roughness geometry. For the square Bars turbulators a pitch to height ratio, p/e equal to 10 presents the highest Nusselt number (Nu). For the V-shaped turbulators the most efficient configuration is that with p/e = 5. The segmented V-shaped turbulators present the highest Nu when compared with all the geometries considered. The p/e = 3 configuration leads to the highest convective heat transfer. This is due to the vortices created at the sidewalls that eject the heat out of the turbulator cavity.