(Kinetic theory and boundary conditions for flows of highly inelastic spheres)
In this quarter we accomplished two milestones. First, we qualitatively compared the approximate solutions for gravity-driven granular flows down bumpy inclines obtained by Richman and Marciniec (1990) to the experimental results for the same flows obtained by Johnson and Jackson (1990). The comparison was made by employing the reparameterized solutions of Richman and Marciniec (1990) and by analyzing several angles of inclination, coefficients of restitution, and boundary geometries. Next, we obtained exact numerical solutions of the equations of motion that were solved approximately by Richman and Marciniec (1990). We found that there are flow rates at which two flows are possible. Of the two, the less massive is more dilute, more thermalized, and faster than its more massive counterpart. In addition we found that the approximate results obtained by Richman and Marciniec (1990) for the same flows are in reasonable agreement with the numerical solutions. The numerical work is outlined in detail in the report. (VC)
- Research Organization:
- Worcester Polytechnic Inst., MA (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-91PC90185
- OSTI ID:
- 5667699
- Report Number(s):
- DOE/PC/90185-T4; ON: DE92012645
- Country of Publication:
- United States
- Language:
- English
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Kinetic theory and boundary conditions for flows of highly inelastic spheres
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