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Interphase forces between the gas and liquid phases determine many phenomena in bubbly flow. For the interphase forces in a multiphase rotodynamic pump, the magnitude analysis was carried out within the framework of two-fluid model. The purpose of this paper is to clarify the relative importance of various interphase forces on the mixed transport process, and the findings herein will be a base for the future study on the mechanism of the gas blockage phenomenon, which is the most challenging issue for such pumps.

Four types of interphase forces, i.e. drag force, lift force, virtual mass force and turbulent dispersion force (TDF) were taken into account. By comparing with the experiment in the respect of the head performance, the effectiveness of the numerical model was validated. In conditions of different inlet gas void fractions, bubble diameters and rotational speeds, the magnitude analyses were made for the interphase forces.

The results demonstrate that the TDF can be neglected in the running of the multiphase rotodynamic pump; the drag force is dominant in the impeller region and the outlet extended region. The sensitivity analyses of the bubble diameter and the rotational speed were also performed. It is found that larger bubble size is accompanied by smaller predicted drag but larger predicted lift and virtual mass, while the increase of the rotational speed can raise all the interphase forces mentioned above.

This paper has revealed the magnitude information and the relative importance of the interphase forces in a multiphase rotodynamic pump.

This study aims to investigate the research question: how do women leaders in the professional business services (PBS) sector develop and approach workplace (in)authenticity?

Ten senior women leaders in the Midlands region of the UK were purposefully selected and interviewed. A semi-structured approach meant that the author adopted a social constructionist paradigm and feminist interpretation. Questions were designed to elicit rich descriptions from the participants. An inductive thematic analysis was conducted to address the study’s purpose.

Four themes were important to women when they developed and approached workplace (in)authenticity: (1) Power Structures, (2) Fit to Belong, (3) Influential Femininity and (4) Through Her Evolution. Women described masculine-majority organisations exerting power. They were pressured into altering their behaviours to “fit” into workplaces. When women had the latitude to be themselves, their leadership excelled. Women’s authenticity developed through increased self-knowledge, helping them to overcome workplace challenges. The study concluded that women face complexities when developing and approaching their constructions of authenticity, namely in the barriers and ramifications they face.

The study suggests several implications for practice and theory concerning enablers and barriers to women leaders' workplace authenticity. The link between authenticity and workplace gender equity needs to be investigated.

The study provides evidence that women are challenged when becoming authentic, therefore, altering their careers irrecoverably in some cases.

This chapter examines representations of gender in online modafinil markets. While gender has often been absent from scholarship on online drug markets, our analysis demonstrates the ubiquity of gender in representations of modafinil users and sellers. The analysis draws on visual images, blogs, and marketing emails relating to three websites selling modafinil, discussed pseudonymously. We describe the range of ways that notions of gender are represented in advertising. Although women represent around 40% of that buying modafinil online, websites and communications tended not to feature women. Although sexist stereotypes of women were rarely present (in contrast to direct-to-consumer pharmaceutical advertising), the ways that modafinil was imagined tended to focus narrowly on corporate spheres of work and productivity. We contrast this narrow imaginary with female journalists’ own accounts of using modafinil to manage illness and enhance creativity. Thus, we conclude that the ways that modafinil has been imagined reflects working assumptions as to who is considered the ‘normal’ participant in online modafinil markets.