Methane - Prandtl number vs. Temperature

Calculate and display the Prandtl number for methane at varying temperatures and pressures. The Prandtl Number (Pr) is a dimensionless number approximating the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity, used in heat transfer and convection calculations. Formula: Pr = μ Cp / k, where μ is absolute viscosity, Cp is specific heat, and k is thermal conductivity.

Temperature (K)	Temperature (°C)	Temperature (°F)	Pr at 1 bara (14.5 psia)	Pr at 10 bara (145 psia)	Pr at 100 bara (1450 psia)
160	-113	-172	0.7721	0.8659	1.629
180	-93.2	-136	0.7583	0.817	1.64
200	-73.2	-99.7	0.7487	0.7892	1.867
220	-53.2	-63.7	0.742	0.7726	2.055
240	-33.2	-27.7	0.7369	0.7607	1.453
260	-13.2	8.3	0.7328	0.7515	1.148
280	6.9	44.3	0.7299	0.7452	1.007
300	26.9	80.3	0.7279	0.7402	0.9304
320	46.9	116	0.7261	0.737	0.8824
340	66.9	152	0.7243	0.7341	0.8501
360	86.9	188	0.7234	0.7312	0.8269
400	127	260	0.7216	0.7276	0.7968
500	227	440	0.7182	0.7233	0.756
600	327	620	0.7155	0.7179	0.7385
700	427	800	0.7127
800	527	980	0.7099
900	627	1160	0.7082
1000	727	1340	0.706