Showing papers by "Christopher Gorse published in 2008"
TL;DR: In this article, a self-consistent approach for the thermodynamic properties and a higher order approximation of the Chapman-Enskog method for the transport coefficients have been used for high temperature equilibrium air plasmas.
Abstract: Thermodynamic and transport properties of high temperature equilibrium air plasmas have been calculated in a wide pressure (\(0.01\div100\) atm) and temperature range (\(50\div60\,000\) K). The results have been obtained by using a self-consistent approach for the thermodynamic properties and higher order approximation of the Chapman-Enskog method for the transport coefficients. Debye-Hukel corrections have been considered in the thermodynamic properties while collision integrals of charge-charge interactions have been obtained by using a screened Coulomb potential. Calculated values have been fitted by closed forms ready to be inserted in fluid dynamic codes.
199 citations
TL;DR: In this paper, diffusion and viscosity-type collision integrals for interactions between atoms and ions of oxygen in ground and electronically excited states were evaluated from the relevant potentials of the molecular and molecular ion states, respectively.
11 citations
01 Jun 2008
TL;DR: The module includes some basic surveying techniques and a levelling exercise which involves the transfer of a level from an assumed benchmark to establish a temporary benchmark some distance away and many students find it difficult to visualise what is happening.
Abstract: Courses run by the School of the Built Environment have a range of entry requirements that enable diverse students and those with lower academic qualifications to gain entry. This results in a particular challenge for the Documentation & Estimating module, which is a very practical, skillsand competence-based module. It is delivered to large tutorial cohorts of mixed courses, abilities, ages and experience. Many students need one-toone guidance to understand what, practically, they have to do. They are given the theory first in a lecture and then have practical tutorials to carry out assessed exercises with limited tutor contact time. The module includes some basic surveying techniques and a levelling exercise which involves the transfer of a level from an assumed benchmark to establish a temporary benchmark some distance away. Many students have problems with computation of results. In spite of a careful introduction and explanation of the use of the instruments and techniques, many students find it difficult to visualise what is happening.
1 citations
01 Jan 2008
TL;DR: Feedback from teachers, specialists and students suggest that maths applied to construction context supported by web based multimedia has potential to capture interest and support teaching and learning in vocational and non-vocational environments.
Abstract: There is a school of thought that maths set in a real context has greater relevance to students than theoretical maths that is taught without specific application. Using virtual e-learning it is now possible to link theory to practice, creating a more interesting and stimulating learning environment. Notwithstanding the advantage of seeing where maths can be applied, those engaged in pure maths believe that teaching the subject in a context may limit understanding. Advocates of pure mathematics consider that contextual learning is a form of coaching which limits application outside the subject area. However, for many students not being able to see the practical uses can make the study of maths meaningless. Applied maths is relevant and can be interesting. Capturing the interest of those studying maths is a key agenda for government as the general standard of maths in the UK is falling. Construction students that struggle to see the importance of maths and fail to recognise its use may benefit from multimedia applications that present the maths in a real context. In a virtual environment, with images taken from real sites, it is possible to apply maths to construction situations bringing the subject to life. With interactive platforms students can be guided through the maths problems. Working with industry some simple maths tools have been created and evaluated. Workshops with teachers and students were structured to obtain qualitative data on the tools. The interest levels and potential areas of development were a key consideration for the research. Feedback from teachers, specialists and students suggest that maths applied to construction context supported by web based multimedia has potential to capture interest and support teaching and learning in vocational and non-vocational environments. Reflections, criticism and comments from an initial evaluation are presented and discussed and areas of possible development suggested.
23 Jun 2008
TL;DR: In this article, the authors derived the transport coefficients of an LTE air plasma in the framework of the ChapmanEnskog theory, including the effect of low-lying excited states of oxygen and nitrogen atoms and ions.
Abstract: Transport coefficients of an LTE air plasma are derived in the framework of the ChapmanEnskog theory, including the effect of low-lying excited states of oxygen and nitrogen atoms and ions. Elastic collision integrals for interaction involving excited species are calculated referring to a phenomenological approach, successfully applied to ground-state components of planetary atmospheres. The inelastic contribution, affecting odd-order collision integrals, is estimated from relevant resonant charge and excitation exchange processes for atom-parent-ion and atom-atom collisions respectively.