One problem is that the fundamental physics of bulk particulate tribocharging have hitherto been poorly understood.
Unbound aggregate is the bulk particulate material providing bearing capacity and other functions by the compacted particles without binding agent.
Conveying system parameters in terms of pipeline bore and air supply pressure are considered in relation to achieving these design objectives for the different groups of bulk particulate materials considered.
The capability of a pneumatic conveying system for conveying bulk particulate materials depends mainly upon five parameters: pipe bore, conveying distance, pressure available, conveying air velocity, and material properties.
When bulk particulate solids are subjected to an electric field, a remarkable phenomenon occurs as manifested, e.g. in the electro rheological fluids and in a device developed for controlling the flow of granular materials, the electromechanical valve for solids (EVS).
Bulk particulate solids subjected to compression and shearing may experience attrition and segregation of the debris which can cause amongst others dust hazards, difficulty in material handling and 'off-specification' products.
The introduction to this guide provides a brief introduction to the topic of pneumatic conveying, within the overall subject area of bulk solids handling, to explain where and how it fits and the distinct advantage that pneumatic conveying has over alternative mechanical handling means of conveying bulk particulate materials.
This chapter provides a bridge between an understanding of the capabilities of bulk particulate materials for flow in pipelines, provided in earlier chapters, and the actual mechanism of designing a pneumatic conveying system, or checking the performance of an existing system, that follows in the subsequent sections of this Design Guide.
These failures were independent of bulk or particulate allograft [ 44].
Three macroscopic forms of cubic phase are typically encountered: precursor, bulk and particulate (i.e., cubosomes).
