MFiX (Multiphase Flow with Interphase eXchanges ) 是由NETL (National Energy Technology Laboratory) 开发并维护的开源软件，致力于解决实际装置中的多相流问题 (Open source multiphase flow modeling for real-world applications)。该软件在学术领域颇有影响力，但在国内使用者似乎并不多见。该软件的功能和Fluent的相应模块相比，可以说是平分秋色。尤其在多相流模型中的Eulerian方法，归根溯源，可以明显看出Fluent参考了MFiX的思路(Mfix (polyphase flow with interphase exchanges) is an open-source software developed and maintained by NETL (National Energy Technology Laboratory), which is dedicated to solving the problem of open source polyphase flow modeling for real world applications in practical devices. The software has a great influence in the academic field, but it seems to be rarely used in China. Compared with the corresponding modules of fluent, the function of the software is equal. Especially in the multiphase flow model, the Euler Ian method can be traced back to the source. It can be clearly seen that fluent refers to the idea of mfix)