Design study of a regenerative pump using one-dimensional and three-dimensional numerical techniques

Regenerative pumps are low cost, compact, able to deliver high heads at low flow rates. Furthermore with stable performance characteristics they can operate with very small NPSH. The complexity of the flow field is a serious challenge for any kind of mathematical modelling. This paper compares an analytical and numerical technique of resolving the performance for a new regenerative pump design. The performance characteristics computed by a CFD approach and a new one-dimensional model are compared and matched to experimental test results. The approaches of both modelling techniques are assessed as potential design tools. The approaches are shown to not only successfully resolve the complex flow field within the pump; the CFD is also capable of resolving local flow properties to conduct further refinements. The flow field is represented by the CFD as it has never been before. A new design process is suggested. The new regenerative pump design is considered with a comparable duty centrifugal pump, proving that for many high head low flow rate applications the regenerative pump is a better choice

Supplementary narrative stories in United States history with secondary grade interest and intermediate grade reading level

Thesis (Ed.M.)--Boston Universit

The Whole is Not Always Greater than the Sum of Its Parts: A Call for Stricter Regulation of Post-Mortem Human Tissue

This article examines the regulatory system surrounding the post-mortem human tissue industry. The author begins by describing many valuable applications of human tissue donations and then how persons misuse and abuse such privileges. The author goes on to explain current regulatory systems and agencies which oversee the regulation, concluding the laws need reform of several issues

Study of knots in material culture

In this paper we will discuss knots in material culture, giving an overview of their importance and range of usage. We will then discuss a method of characterization for these knots and a method to study these knots through cultural evolution. We then give some preliminary results and ideas for further study

The Whole is Not Always Greater than the Sum of Its Parts: A Call for Stricter Regulation of Post-Mortem Human Tissue

This paper examines the current law and urges the greater regulation of the post-mortem human tissue industry. Part II illustrates the many post-mortem uses of the human body. Part III describes several post-mortem misuses and abuses of donor cadavers, organs and tissue resulting from a gap in current regulation. Part IV lays out the entities involved in the oversight of the tissue banking industry and explains the current state of regulation, including pending legislation and its potential effectiveness in addressing past shortcomings. Part V examines why the current and pending legislation does not adequately address the industry problems and urges greater regulation of the post-mortem tissue banking system

An experimental and computational analysis of buoyancy driven flows by laser sheet tomography, particle image velocimetry and computational fluid dynamics

This paper contains details of a three pronged investigation into the development of a buoyant jet impinging on a wall in a closed vessel. The development of the flow was measured experimentally by particle image velocimetry (PIV) and laser sheet tomography. The experimental results are compared with a computational model of the flow calculated by the computational fluid dynamics (CFD) package PHOENICS

Immorality and Irrationality

Does immorality necessarily involve irrationality? The question is often taken to be among the deepest in moral philosophy. But apparently deep questions sometimes admit of deflationary answers. In this case we can make way for a deflationary answer by appealing to dualism about rationality, according to which there are two fundamentally distinct notions of rationality: structural rationality and substantive rationality. I have defended dualism elsewhere. Here, I’ll argue that it allows us to embrace a sensible – I will not say boring – moderate view about the relationship between immorality and irrationality: roughly, that immorality involves substantive irrationality, but not structural irrationality. I defend this moderate view, and argue that many of the arguments for less moderate views turn either on missing the distinction between substantive and structural rationality, or on misconstruing it