Hydrogen is deemed to be the pivotal substitute for fossil fuels because it has high heating value and zero carbon emissions. Moreover, hydrogen can be produced from renewable sources through alkaline water electrolysis. This study investigates the impact of some operational parameters of alkaline water electrolysis on the gas void fraction. The numerical model of this cell, which consists of the Euler–Euler model and the Secondary current distribution, is solved by the Finite Element method for enhancing the gas void fraction. This research first studies the influence of the inlet flow of electrolyte on the gas void fraction of the alkaline water electrolysis cell. Subsequently, this analysis observes the effect of the concentration of Potassium hydroxide at 70 °C on the gas void fraction. Hence, this study shows that the gas void fraction in an Alkaline Water Electrolysis System has better performance at a low inlet flow rate of electrolyte. Furthermore, the result of this research has shown that the gas void fraction at 70 °C has a proportional relation with the concentration of Potassium hydroxide up to 6 molarity, and exceeding this value, the relation becomes adverse.