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advantage over SFFs. However, this hydrodynamic analysis needs to be coupled with electrochemical performance of each flow field to obtain the most efficient flow field for each application. 4.2- Future directions The HEAM is developed by using a linear relationship between the pressure drop and the flow rate. Several publications suggest a parabolic equation using friction factor and dimensionless numbers to predict pressure drop. [55,76,85] The friction factor is defined to be inversely proportional to the flow rate in laminar flow regime to preserve the linear relationship between the pressure drop and the flow rate. However, this approach has the benefit to be more flexible when there are non-linearity in the data due to turbulence. [87] Integrating this approach to the HEAM enhances its accuracy. However, non-linearities between the pressure drop and the flow rate complicates the HEAM linear approach to this relationship. It needs to be overcome by changing the approach of the model. The modeling in porous media deviates from experimental data and is a cause for inaccuracy in predicting IFF pressure drop. Finding more sophisticated models for porous media is a goal that requires intense literature review and testing different models with experimental data that can be performed in the future. In this study, six dimensionless numbers to describe the hydrodynamic of RFB cells are identified and their effect on the pressure drop is investigated. However, the C-value for each case is not tuned due to the absence of data. The next step will be to carefully design experiments to find the change in C-value and implement it in the model for different scenarios. Behavior of dimensionless numbers gives insights into behavior of electrolyte flow inside RFB cells. Additionally, the results from experimental studies can be utilized in large-scale applications of RFB systems. 69PDF Image | Analysis of Fluid Flow in Redox Flow Batteries
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