University of Tennessee
Department of Chemical Engineering


The Computational Materials Research Group (CMRG)

 ORNL Ultra-High Shear Rate Optical Rheometer

 

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The Ultra-High Shear Rate Optical Rheometer has several attractive features

  • High shear rates: Parallel-plate rotational rheometer
  • Very small gap yields very high shear rates
  • Negligible viscous heating
  • Transparent disk and slider allow for optical measurements
  • Simultaneous rheological and optical studies for a wide range of systems
  • In situ sample thickness monitoring via capacitance

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Schematic of disk slider assembly (side view)

Schematic of disk slider assembly (top view)

the optical rheometer

close-up view of the slider and disc

Sample data: Birefringence and Viscosity of Perfluoropolyether Lubricant vs Shear Rate

Sample results: Birefringence vs Shear Stress of Perfluoropolyether Lubricant



Equipment Owner:
  • Hank Cochran




Contact:  email