Abstract
This paper introduces new CFD-based correlations for ribbed roughened solar air heater. An absorber plate of SAH (solar air heater) attached with circular ribs is analyzed in this article. ANSYS Fluent v16 is utilized to analyze the turbulent airflow for different arrangements of rib. All results are based on CFD (computational fluid dynamics) simulations. The analysis is carried out within the limits of Re from 3800 to 18,000 and P from 10 to 25. The resulting data is reduced into correlations using a linear stepwise regression algorithm. The developed equations for artificially roughened heater of solar air predict all the data for friction factor and Nusselt number within ±5% relative absolute deviation.
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