Performance improvement of a decayed flow heat exchanger using spiral flow and nanofluid

The demand for heat exchangers that have high performance is still a major challenge for the industrial field.In this work, a spiral flow of cold air and a 0.5% volume concentration of the nanoaluminum metal heat exchanger were used to analyze the Taylor vortex that forms in the hot nanofluid Al 2 O 3 .According to the experimental results, the effectiveness of the heat exchanger at the ratio C min /C max of 0.08 could be improved over that of the exchanger at the ratio C min /C max of 0.0.Additionally, at an inner cylinder rotational speed of 80 r.p.m, employing the spiral flow of cold air and nanofluid as a hot fluid to transfer heat increased its efficacy can reach up to 53.8%.