Thermodynamic modeling in CFD is basically limited to the models available in the simulators. The method presented in this paper connects CFD simulators with Aspen Plus which instantaneously calculates and returns the value of any physical property required. Therefore, all the thermodynamic models and compounds available in Aspen Plus can be implemented in CFD simulations. The connection, created via Matlab and Excel-VBA, has been validated solving two identical CFD simulations first selecting a thermodynamic model available in the simulator and then connecting the simulator with Aspen Plus and selecting the same model. The maximum absolute average deviation between the density and viscosity values obtained in both simulations, for the two case studies analyzed, is lower than 0.7% which demonstrates the proper interconnection. The accuracy of the results obtained modeling multicomponent mixtures and supercritical fluids prove the applicability of the method to any scenarios.

CFD中的热力学建模基本上仅限于仿真器中可用的模型。本文介绍的方法将CFD仿真器与Aspen Plus连接起来，后者即时计算并返回所需的任何物理属性的值。因此，可以在CFD模拟中实现Aspen Plus中可用的所有热力学模型和化合物。通过Matlab和Excel-VBA创建的连接已经过验证，可以解决两个相同的CFD模拟，首先选择模拟器中可用的热力学模型，然后将模拟器与Aspen Plus连接并选择相同的模型。对于所分析的两个案例研究，在两个模拟中获得的密度和粘度值之间的最大绝对平均偏差小于0.7％，这表明了正确的互连。