Rheometry for large-particulated fluids: analysis of the ball measuring system and comparison to debris flow rheometry

For large-particulated fluids encountered in natural debris flow, building materials, and sewage treatment, only a few rheometers exist that allow the determination of yield stress and viscosity. In the present investigation, we focus on the rheometrical analysis of the ball measuring system as a suitable tool to measure the rheology of particulated fluids up to grain sizes of 10mm. The ball measuring system consists of a sphere that is dragged through a sample volume of approximately 0.5l. Implemented in a standard rheometer, torques exerted on the sphere and the corresponding rotational speeds are recorded within a wide measuring range. In the second part of this investigation, six rheometric devices to determine flow curve and yield stress of fluids containing large particles with maximum grain sizes of 1 to 25mm are compared, considering both rheological data and application in practical use. The large-scale rheometer of Coussot and Piau, the building material learning viscometer of Wallevik and Gjorv, and the ball measuring system were used for the flow curve determination and a capillary rheometer, the inclined plane test, and the slump test were used for the yield stress determination. For different coarse and concentrated sediment-water mixtures, the flow curves and the yield stresses agree well, except for the capillary rheometer, which exhibits much larger yield stress values. Differences are also noted in the measuring range of the different devices, as well as for the required sample volume that is crucial for applicatio

Tools and methods for implementing the control systems on the Mirror Fusion Test Facility

Installation of the major hardware subsystems for MFTF is nearing completion. These subsystems include the Fusion Chamber System, the eighty KV Neutral Beam System, the Superconducting Magnet System, and the Personnel Safety System. The Local Controls group has undertaken a uniform aproach to implementing the control systems for all of these hardware subsystems. This approach has two major aspects: (1) to provide a stand-alone computer control system with a remote, portable terminal so that computer control can be provided at the site of the hardware for initial testing, (2) to provide hardware simulators so that the complicated MFTF computer control system can be tested independent of the hardware. The software and hardware tools which were developed to carry out this plan will be described. Our experiences with bringing up subsystems containing up to 900 separate channels of control and status will also be described

Corn, 1985

Harry C. Minor is an Associate Professor of Agronomy and State Extension Specialist; Carl G. Morris is a Senior Research Specialist; and Delbert Knerr, Eric Lawman, and Kurt Hohnstrater are Research Specialists.Compares hybrids and includes experimental procedures, cultural practices, rainfall and temperature, charts, maps and tables and seed corn company addresses.Comparing hybrids -- Experimental procedures -- Cultural practices -- Rainfall and temperature -- Summary of results --Rainfall and irrigation applies -- Yield results -- Seed corn company addresses

Corn, 1984

Harry C. Minor is an Associate Professor of Agronomy and State Extension Specialist; Carl G. Morris is a Senior Research Specialist; and Delbert Knerr, Eric Lawman, and Virgil Sparks are Research Specialists.Includes experimental procedures, cultural practices, rainfall and temperature, charts, maps and tables and seed corn company addresses.Experimental procedures -- Cultural practices -- Rainfall and temperature -- Summary of results -- Irrigation charts -- Northern locations -- Central locations -- Southeast locations -- Irrigated locations -- Summary of entries and 1984 test locations -- Seed corn company addresses

Corn, 1982

Harry C. Minor is an Associate Professor of Agronomy and State Extension Specialist; Carl G. Morris is a Senior Research Specialist; and Delbert Knerr, Eric Lawman, and Virgil Sparks are Research Specialists.Compares hybrids and includes experimental procedures, cultural practices, rainfall and temperature, charts, maps and tables and seed corn company addresses.Comparing hybrids -- Experimental procedures -- Cultural practices -- Rainfall and temperature -- Summary of results -- Irrigation charts -- Northern locations -- Central locations -- Southeast locations -- Irrigated locations -- Summary of entries and 1982 test locations -- Seed corn company addresses