Current and Past research:

• Average stress patterns in the granular piston. (5/24/01)

• Slides from the Division of Fluid Dynamics Meeting 2000, in Washington DC. (11/17/00)

• Images from the granular piston experiment(8/25/2000)

• Granular Piston(5/12/2000)

• Streak photos of booming dune sand (4/5/1999)

• False color images from my experiment showing nice granular flow. (1/6/1999)

• Onset of convection and instabilities in vertically shaken sand (9/23/1998)

• Spacetime plots of vertically shaken sand (9/22/1998)

• Spacetime plots of vertically shaken smooth sand (9/29/1998)

• Long-term spacetime plots of smooth sand (10/20/1998)

• Numerical simulations of aggregate structures in the solidification of NH₄Cl (8/15/1998)

• Convection in Porous Media: Image Processing (7/31/1996)

• Stress Chains in a 2D Annulus: Image Processing (7/31/1996)

• Measurements of the temperature field of mushy and liquid regions during solidification of aqueous ammonium chloride. J. Fluid Mech. 358, 87-106. (1998)

• Aggregation and chimney formation during the solidification of Ammonium Chloride. Phys. Rev. E. 60 p. 3063-3071 (1999)

• Slides from the talk that I gave at the DFD '99 meeting. (11/29/1999)

• Slides from the talk I gave at APS Centennial (Mar '99) meeting. (3/9/1998)

• Slides from the talk I gave at the Division of Fluid Dynamics '98 meeting. (12/4/1998)

Currently, I am working for Dr. Behringer's group, officially known as LTB -- Low Temperature Behringer -- though no one is presently working on low temperature stuff. I am presently looking at the onset of convection in vertically vibrated granular material.

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Other research interests. - Hartley's main home page

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Duke Physics	CNCS

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Granular Links:

Powder Page

The Caltech Granular Flows Group

Chicago Materials Center

HLRZ Many Particle Physics Group

Strukturbildung in Granularer Materie

P.M.M.H./E.S.P.C.I. Paris

Humboldt - Universität zu Berlin

CATS granular flow group

Chicago Granular Page

Center for Nonlinear Dynamics