Kathmandu University

About: Kathmandu University is a education organization based out in Kathmandu, Nepal. It is known for research contribution in the topics: Population & Turbine. The organization has 1851 authors who have published 2316 publications receiving 26676 citations.

Hermeneutic phenomenological research method simplified

Abstract: This write-up aims to first clarify the notion of phenomenology by offering sayings of different experts of this genre. Thereafter, it attempts to briefly trace its genesis and classify this broad idea in three different schools viz. transcendental, hermeneutic and existential. After discussing very precisely on each of these schools, it focuses on the premises of hermeneutic phenomenology as a method for doing research. The purpose of this essay is to collect and exhibit a crude paradigmatic clue of doing a hermeneutic phenomenological research. During the course, it emphasizes on the metaphysical stance, methodological grounds, quality concerns and ethical issues that contribute to its paradigmatic assumptions. Bodhi: An Interdisciplinary Journal, 5, 2011, Page 181-200 DOI: http://dx.doi.org/10.3126/bodhi.v5i1.8053

A general two-phase debris flow model

Abstract: [1] This paper presents a new, generalized two-phase debris flow model that includes many essential physical phenomena. The model employs the Mohr-Coulomb plasticity for the solid stress, and the fluid stress is modeled as a solid-volume-fraction-gradient-enhanced non-Newtonian viscous stress. The generalized interfacial momentum transfer includes viscous drag, buoyancy, and virtual mass. A new, generalized drag force is proposed that covers both solid-like and fluid-like contributions, and can be applied to drag ranging from linear to quadratic. Strong coupling between the solid- and the fluid-momentum transfer leads to simultaneous deformation, mixing, and separation of the phases. Inclusion of the non-Newtonian viscous stresses is important in several aspects. The evolution, advection, and diffusion of the solid-volume fraction plays an important role. The model, which includes three innovative, fundamentally new, and dominant physical aspects (enhanced viscous stress, virtual mass, generalized drag) constitutes the most generalized two-phase flow model to date, and can reproduce results from most previous simple models that consider single- and two-phase avalanches and debris flows as special cases. Numerical results indicate that the model can adequately describe the complex dynamics of subaerial two-phase debris flows, particle-laden and dispersive flows, sediment transport, and submarine debris flows and associated phenomena.