This study is the analysis of several geometric parameters of conical basin design and their effect on vortex formation and energy. Here we have studied effect of various parameters individually on vortex velocity by using Computational Fluid Dynamics. For a given flow and head the different geometrical parameters that can be varied of conical basin for gravitational water vortex power plant are: (i) basin opening, (ii) basin diameter (iii) notch length iv) Canal Height and v) Cone Angle. Different basin configuration were developed using Solid Works software and model was simulated by Commercial CFD code ANSYS Fluent. Each parameter was varied individually and corresponding velocity in region of interest was noted.