Abstract: The inertance pulse tube cryocooler (IPTC) is well known as one of the most effective cryocooler for the cooling of infrared imaging detectors and superconducting technologies. The reciprocating flow in an IPTC was modeled with a computational thermal fluid dynamics. Two dimensional modeling consists of the flows in the cylinder of compressor, a regenerator, a pulse tube, heat exchangers, an inertance tube, and a gas reservoir. The user-defined function was applied to the compression and expansion stroke of piston in the compressor. It was confirmed that the temperature at the cold heat exchanger decayed to the lowest temperature with an oscillating convergence due to the compression and expansion of piston in the compressor. The spatial distributions of temperature and flow velocity are also compared for the piston at the top dead center and bottom dead center during compression and expansion strokes

• Publication Date: 21-Dec-2014
• DOI: 10.15224/978-1-63248-037-8-112
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Abstract: The world is becoming a global village. In fact we are living in a borderless economy. A country, whether developed or developing cannot exist in separation. Globalization creates both opportunities and threats or challenges for the nation states. Review of literature reveals that developed countries are monopolizing the fruits of globalization and developing countries like Bangladesh could not reap the benefits of globalization due to lack of preparedness. This paper mainly focuses on examining the opportunities and challenges of globalization in the context of Bangladesh. The paper suggests that Bangladesh can successfully take on the challenges of globalization by encouraging productivity through its people. This paper recommends to implement people driven strategy to enhance productivity at the enterprise level in Bangladesh.

• Publication Date: 21-Dec-2014
• DOI: 10.15224/978-1-63248-036-1-52
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