This submission shows the temperature response to one-sided heating in a turbulent pipe flow at $Re_b = 19000$ ($Re_\tau \approx 550$). Starting with a constant inlet temperature, the flow undergoes thermal development until it reaches a steady state. The pipe has a length of 77.5 diameters and was transformed into the curled up shape a posteriori.

The fluid considered is an incompressible Newtonian Fluid with constant material properties. On the left, the molecular Pr number is set to 0.025 (representative for liquid metals) and on the right, the Pr number is 0.71, representative for air. The higher molecular diffusivity of low-Pr fluids leads to a smoother temperature field compared to air, and a shorter development length.

The simulation was performed using the GPU code NekRS on the GPU cluster Hunter @ HLRS Stuttgart, requiring a total of 3000 GPU hours or 1700 kWh of electricity.

The author may or may not have worn party glasses or consumed licorice snails while preparing this submission.