Sharif Digital Repository

In this paper, a numerical model is developed for the assessment of carbon dioxide transport through naturally fractured cap-rocks during CO2 sequestration in underground aquifers. The cap-rock contains two types of fracture with different length scales: micro-cracks (fissures) and macro-cracks (faults). The effect of micro-cracks is incorporated implicitly by modifying the intrinsic permeability tensor of porous matrix, while the macro-cracks are modeled explicitly using the extended finite element method (X-FEM). The fractured porous medium is decomposed into the porous matrix and fracture domain, which are occupied with two immiscible fluid phases, water and CO2. The flow inside the... 

Purpose-The purpose of this paper is to develop an integrated dynamic model, based on empirical findings, which can be used in research centers for evaluating the performance of research projects by using multiple attribute utility theory. Design/methodology/approach-In developing the model, the measures by which the performance of research projects could be evaluated are identified by Delphi method and group decision making. These measures are categorized into three general success factors of time, cost and quality. Then a multi-attribute utility function is applied to integrate these dimensions to determine the utility resulting from the performance of the project. Findings-Through...