... transfer enhancement Coaxial heat exchanger Spiral fin Double slanted fin CFD simulation In the deep layers of the earth, the composition of rocks and soil is complex, with internal groundwater flow, making it difficult to accurately obtain parameters including porosity, heat conductivity...

... investigations were carried out for three different configurations, namely an empty duct, a parallel arrangement and a crosswise arrangement of recycled water-filled aluminum cans, while three-dimensional CFD simulations were used to analyze internal airflow characteristics, temperature distribution...

..., and fin length, and also their levels were recognized from the literature. The Taguchi method was applied to formulate the CFD simulation work. Findings – The simulation results were compared and validated with an available experimental data. The mean deviations of the Colburn factor, j...