Table of Contents

• Abstract
  
  
• Introduction
  
  
• Convection in Rotating Frames
  
  
• The Experiment
  
  
• Results
  
  
• Conclusions
  
  
• Acknowledgements
  
  
• References
  
  

We have experimentally demonstrated the differential rotation of a pulsed jet that radially expands in a rotating frame. We chose less shear in the Ω_differential case than will be used in the liquid sodium experiment to measure the pulsed jet rotation because of the stated difficulties in obtaining accurate flow visualization images. We believe that we have shown that there is more rapid jet rotation in the Ω_differential case than in the Ω = const case. The partial entrainment of the jets with the background flow leads to a drag on differential rotation in the case of Ω = const flow and to an acceleration of differential rotation of the pulsed jet in an Ω_differential rotating frame. We presume that this is due to turbulent entrainment in the sheared flow field and so we should expect a still more enhanced effect in the sodium experiment where the shear is still greater. The final determination of the effective α-effect will have to be done magnetically or with 3-D numerical modeling with Re > 10⁴ and Re_mag > 200. We believe that an understanding of Eq. (5) is substantiated.