Journal of the American Oil Chemists' Society

, Volume 79, Issue 10, pp 961–964 | Cite as

Rheological characterization of yellow grease and poultry fat

  • John W. Goodrum
  • Daniel P. Geller
  • Thomas T. Adams


The rheological properties of yellow grease and poultry fat and their liquid density at 25.0°C were experimentally determined. Dynamic viscosities of these industrial recycled fat products were measured for shear rates of 0.65 to 32.34 s−1 at temperatures of 15.6 to 71.1°C. The resulting measurements were fitted to a power law model to obtain values for the consistency coefficient and the flow behavior index. The data was also fit to Andrade's equation to relate viscosity to temperature. These results indicated pseudoplastic flow behavior for both products, with increasing non-Newtonian behavior at higher temperatures and shear rates.

Key Words

Biodiesel chicken fat fatty acids poultry fat recycled fats rheology shear rate triglycerides viscosity yellow grease 


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Copyright information

© AOCS Press 2002

Authors and Affiliations

  • John W. Goodrum
    • 1
  • Daniel P. Geller
    • 1
  • Thomas T. Adams
    • 1
  1. 1.Department of Biological and Agriculatural EngineeringUniversity of GeorgiaAthens

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