Abstract:

High molecular polymers are widely used in the field of new materials, and their non-Newtonian fluid properties pose challenges to the calculation of engineering hydraulics pressure drop. The rheological parameters of oligomer non-Newtonian fluid and the calculation method of pipeline pressure drop are analyzed in this paper. The results show that the oligomer fluid exhibits the characteristics of non-Newtonian fluid and conforms to the characteristics of power law flow pattern. When the flow rate or average velocity of the oligomer fluid is given, the pressure drop gradient of laminar flow and the pressure drop of turbulent fluid can be calculated by the modified Blasius drag formula and the modified Karman drag formula.

Key words: oligomer;non-Newtonian fluid, rheological parameter, pipeline pressure drop, engineering optimization