This study concerns turbulent flow submitted to high heat transfer and characterized by a strong coupling between temperature and turbulence. This kind of configuration is encountered in gas-pressurized receivers of concentrated solar power tower plants. To improve knowledge of turbulence in the case of large temperature gradient and its modeling, both Direct Numerical Simulation (DNS) and Large Eddy Simulations (LES) of the anisothermal flow in asymmetrically heated channels are performed. Two different types of heating, representing the middle and the end of the solar receiver, are studied. Two types of heating are investigated. In the first case, the mean fluid temperature is below the cold wall temperature, meaning that it is heated from the both walls. In the second case, the mean fluid temperature is between the two wall temperatures. These two configurations induce opposite directions of the velocity in the wall-normal direction near the cold wall. Several LES models coupled with thermal models are used and compared with data provided by DNS carried out in both types of heating. The results highlight the good results of the tensorial formulation of the Anisotropic-Minimum-Dissipation model.