Chemical Engineering Tutorials: Ergun Equation For Packed Beds

Sunday, 28 January 2024

Ergun Equation For Packed Beds

Ergun Equation gives us the pressure drop along the length of a packed bed reactor at a given fluid velocity.

From Ergun Equation we can understand that the pressure drop in a packed bed depends on the size of the packing material, length of the bed and the density of the fluid. 

The Ergun equation is the sum of a viscous term, corresponding to the Kozeny-Carman equation (which was developed for lowly to moderately porous media), and an inertial term, corresponding to the Burke-Plummer equation (which was developed for highly porous media). 













The pressure drop in the pipes can be expressed as follows:
































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