The die is used to get the desired shape during the extrusion of hydrogenic fluid. The extruded rod is cut to get the required length of the pellet and injected in the form of fuel into the fusion reactor. The design of the die is an important preliminary step in the development of the extruder system. Therefore the study of die requires a knowledge of the rheological behavior of hydrogen and its effect on change in pressure and viscous heating. The Polyflow CFD tool from ANSYS has been used to study the characteristics of pressure, local shear rate, and viscous heating at different temperatures of solid hydrogen. In the present investigation, the uniform cross-section die has been simulated at non-isothermal conditions. The results obtained from the CFD analysis have been validated from the literature. The correlation between flow rate and viscous dissipation helps to understand the non-isothermal behaviors of hydrogen. Different contours have been included to know the local changes of pressure and shear rate at minimum and maximum flow rates.