This work presents experimental and CFD simulation results of heat transfer for water and CuO-water nanofluid flow systems stabilized by capping agents. The experiments were carried out in a helically coiled tube in the range of turbulent flow regime with Reynolds numbers from 6000 to 21,968, for practical applications importance. Nusselt number enhancement with regard to host liquid was observed, up to 18–35 % for nanofluids under investigation. Numerical calculations were performed using the ANSYS® Fluent® package employing homogenous single-phase model with the assumption of constant wall temperature condition. The k-ε Realizable Turbulence and Enhancement Wall Treatment models were applied in all analyzed cases. New type stabilizer CTAC was employed which lead to enhanced heat transfer in coil in obtained nanofluids.

这项工作提供了由封端剂稳定的水和CuO-水纳米流体流动系统传热的实验和CFD模拟结果。该实验在湍流范围内的螺旋盘管中进行，雷诺数为6000到21968，对于实际应用很重要。观察到与宿主液体有关的Nusselt数增加，所研究的纳米流体最多可提高18-35％。在假设壁温恒定的情况下，使用均质单相模型的ANSYS®Fluent®软件包进行了数值计算。在所有分析案例中均采用了k-ε可实现的湍流和强化墙处理模型。使用新型稳定剂CTAC，其导致获得的纳米流体中线圈中的传热增强。