The paper focused on the numerical simulation of natural and forced convection of N-butyl-N-methylpyrrolidinium bis{trifluoromethyl)sulfonyl} imide ([C4mpyrr][NTf2]), ionic liquids (ILs). For natural convection heated from below in a square enclosure and forced convection flow through a pipe with uniform heat flux condition was considered. In numerical simulation the dimensions of the natural convection enclosure and forced convection tube are considered same as the experimental setup. Both constant and temperature dependent thermophysical properties of ILs are applied in forced convection and only temperature dependent properties are applied in natural convection simulation. The temperature dependent thermophysical properties such as density, viscosity, thermal conductivity, and heat capacity of ILs are measured experimentally. Higher accuracy was observed for temperature dependent models. The numerical results were compared with the experimental data of natural and forced convection, reported reasonably good agreements between experimental and numerical results.

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