Entropy generation in laminar fluid flow through a circular pipe

Creative Commons License

Sahin A. Z. , Ben-Mansour R.

Entropy, vol.5, no.5 SPEC., pp.404-416, 2003 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 5 Issue: 5 SPEC.
  • Publication Date: 2003
  • Doi Number: 10.3390/e5050404
  • Title of Journal : Entropy
  • Page Numbers: pp.404-416
  • Keywords: Entropy, Generation, Heating, Numerical, Pipe, Two-dimensional


A numerical solution to the entropy generation in a circular pipe is made. Radial and axial variations are considered. Navier-Stokes equations in cylindrical coordinates are used to solve the velocity and temperature fields. Uniform wall heat flux is considered as the thermal boundary condition. The distribution of the entropy generation rate is investigated throughout the volume of the fluid as it flows through the pipe. Engine oil is selected as the working fluid. In addition, water and Freon are used in a parametric study. The total entropy generation rate is calculated by integration over the various cross-sections as well as over the entire volume.