3rd Year Thermodynamics Lab Report Mechanical Engineering Science 10 Forced Convection (in a cross flow heat exchanger) Summary The aim of this lab is to determine the average convective heat transfer coefficient for forced convection of a fluid (air) past a copper tube‚ which is used as a heat transfer model. Introduction The general definition for convection may be summarized to this definition "energy transfer between the surface and fluid due to temperature
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contact with the surface that is causing the frictional force. For example‚ if you have a block moving horizontally on flat ground‚ the normal force points at a 90° angle out of the ground. The unit for force is the Newton (named after Sir Isaac Newton)‚ which is equal to 1 (kg) (m) / s2. The coefficient of friction‚ symbolized by the Greek letter µ (“mu”)‚ is dimensionless‚ which means it has no units. Dimensionless numbers help scientists‚ mathematicians‚ and engineers compare the same characteristic
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Journal of Fluids and Structures ] (]]]]) ]]]–]]] Contents lists available at SciVerse ScienceDirect Journal of Fluids and Structures journal homepage: www.elsevier.com/locate/jfs Tree-inspired piezoelectric energy harvesting William B. Hobbs a‚ David L. Hu a‚b‚Ã a b School of Mechanical Engineering‚ Georgia Institute of Technology‚ Atlanta‚ GA 30332‚ USA School of Biology‚ Georgia Institute of Technology‚ Atlanta‚ GA 30332‚ USA a r t i c l e i n f o Article history: Received 23
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The Psychometric diagram demonstrates graphically the parameters identifying with water dampness in air. This application note depicts the reason and utilization of the psychometric graph as it influences the HVAC architect or professional. Air includes more or less 78% nitrogen‚ 21% oxygen‚ and 1% different gasses. At the same time air is never dry‚ even in a desert. Two-thirds of the world’s surface is secured with water and this‚ alongside other surface water and downpour‚ keep up low weight
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International Journal of Heat and Mass Transfer 52 (2009) 597–609 Contents lists available at ScienceDirect International Journal of Heat and Mass Transfer journal homepage: www.elsevier.com/locate/ijhmt Numerical simulation of parabolic trough solar collector: Improvement using counter flow concentric circular heat exchangers O. García-Valladares a‚*‚ N. Velázquez b a b Centro de Investigación en Energía‚ Universidad Nacional Autónoma de México‚ Privada Xochicalco s/n‚ Temixco‚ Morelos
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connected with a push or pull exerted on an object. In this experiment‚ I am using a contact force‚ a force that exists from physical contact between two things. I am pulling the spring scale‚ which measure force in Newtons (kg x m/s2)‚ and then the block is moving. Different masses (kg)‚ or the measure of the resistance of an object to changes in its motion due to a force‚ of an object have different accelerations (∆v/∆t). The more massive the object is‚ the smaller its acceleration.
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Characteristics of Pelton Wheel (Impulse Turbine) Purpose: To investigate typical performance characteristics of an impulse turbine. Apparatus: Armfield Pelton Turbine‚ Armfield Hydraulics Bench and digital tachometer. Sketch a labeled schmematic diagram of the apparatus. Theory and Definitions: (Ref. Munson/Young/Okiishi A Brief Introduction to Fluid Mechanics‚ 3/e‚ p. 479) 1. Ideal Power and efficiency From 1-D energy equation‚ derive the ideal (inviscid flow) power output of an impulse
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to a standard curve. To know about refractive index measurement first of all we know something about refractive index. What is refractive index? In optics the refractive index or index of refraction n of a substance (optical medium) is a dimensionless number that describes how light‚ or any other radiation‚ propagates through that medium. It is defined as ‚ Where‚ where c is the speed of light in vacuum v is the speed of light in the substance example‚ the refractive index of water is
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Dimensional Analysis 2.1 Writing physical relations in dimensionless form . . . . 2.1.1 Characteristic scales and dimensionless variables 2.1.2 The mixing tank DE . . . . . . . . . . . . . . . 2.1.3 The sky-diver DE . . . . . . . . . . . . . . . . . 2.2 Deducing physical relations using dimensional analysis . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.1 A motivating example . . . . . . . . . . . . . . 2.2.2 Complete sets of dimensionless variables . . . . 2.2.3 The Buckingham Pi Theorem
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4.4 MarkingScheme For 1mark multiple-choice questions‚ 1/3 mark will be deducted for a wrong answer. Likewise‚for 2 marks multiple-choice questions‚ 2/3 mark will be deducted for a wrong answer. However‚for the linked answer question pair‚ where each question carries 2 marks‚ 2/3 mark will bededucted for a wrong answer to the first question only. There is no negative marking for wronganswer to the second question of the linked answer question pair. If the first question in thelinked pair is wrongly
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