Numerical modeling of heat transfer of channel with shallow curly dimples

Numerical investigation is focused to heat transfer of rectangular channel with dimples. Developed model was tested for adequacy by simulating of experiment, conducted by Kazan National Research Technical University named after A. N. Tupolev — KAI. Numerical model was verified too for adequacy by reproducing of experiment by A. Tsynaeva, S. Razorenov. The test has been held with Reynolds number $Re=3000\ldots 30000$. The results was found in enough agreement. The heat transfer in rectangular channel with shallow curly dimples was modeled with source Code_Saturne. Numerical modeling are based by RANS approach with k-w SST model. The study was conducted to air ($\nu = 13.28\times 10^{-6}\,\mathrm{m^2/s}$, $c_p = 1005\,\mathrm{J/(kg\cdot K)}$). The 3D computation domain was meshed with source Salome by version 7.6.0. The SIMPLEC algorithm are used for U-p calculation. Generation time of mesh and calculation was estimated. The study of heat transfer was demonstrated by efficiency of curly dimples. Developed model shows heat transfer advantage up to 15.6 % of curly dimples over cylindrical ones of the same depth ($h/D = 0.11$, $h = 2\,\mathrm{mm}$) and contact patch area ($S = 252.02\,\mathrm{mm^2}$).