A Comparative Study of Turbulence Models for Conjugate Heat Transfer to Gas Flow in a Heated Mini-Channel

Asymmetric reverse transition phenomenon in internal turbulent channel flows due to temperature gradients

“…Firstly, a brief summary of the available studies dealing with reversion is given in Table 1. It is straightforward to notice that most of the studies focus on imposed heat flux [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] whereas Dirichlet boundary conditions types are very scant [26,27]. Cylindrical pipes are the most frequently encountered geometry [7, 9-12, 14-16, 18, 20-23, 25] while channels are scarcer [6,8,13,17,26,27].…”

“…In these two sets of papers, it appears that temperature is very often considered as a passive scalar and/or not related to the thermophysical properties, be it for DNS [26,27,[33][34][35][36][37][38][39][40][41][42][43] or for RANS studies [9-11, 13, 15]. In contrast, the influence of temperature on the property variations is still underdeveloped in DNS [44][45][46][47][48] and LES [29][30][31][32][49][50][51] and RANS papers [14,17,24,25,52]. Furthermore, the vast majority of these studies only consider fully developed features; for instance, the few available DNS databases are built within this framework.…”

Improvement of a Turbulence Model for Conjugate Heat Transfer Simulation

“…Researchers have performed investigations on the influence of the turbulence model on the prediction accuracy of CHT simulations [10][11][12][13][14]. The two-equation turbulence models were found to predict an anomalously large growth in turbulent kinetic energy when the high strain rate influences the turbulent kinetic energy with moderate intensity [15].…”