the channel (m) Viscosity (η) is a measure of a fluid’s resistance to flow : • If Re < 2000: laminar flow If 2000< Re < 20000: laminar+turbulent (mixed) If 20000 < Re: turbulent flow (cavitation) Laminar Flow Turbulent Flow Ns m2 • What is the casting yield of process described below? 10 Kg 5 Kg Exercise-1 A certain mold is used to cast a cylindrical part. The cylinder diameter and height is 10 mm and 30 mm respectively. 3000 mm3 liquid is poured into
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• Mass Number – the sum of protons and neutrons in the nucleus of an atom. • Precipitate – a solid‚ insoluble material that forms in a liquid solution. Properties of Matter • Malleability – ability of a substance to be hammered or bent into different shapes. Ex: Aluminum foil. • Viscosity – a measure of how easily a liquid flows. The thicker the liquid‚ the more viscous it is. • Ductility – ability to be drawn into thin wires. Ex: Copper. • Lustre – quality or state of shining. Ex: Gold
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Inert Gases Inert Gases and Characteristics • The inert gases are obtained by fractional distillation of air. • They are often used aboard chemical tankers and product carriers (smaller vessels). • Helium‚ Neon‚ Argon‚ Krypton‚ Xenon‚ Radon and are inert gases. • Duplet (Helium) or Octet • Full valence shell • • • • Weak interatomic force Very low melting and boiling points. Monatomic gases under standard conditions Helium has several unique qualities when compared with
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in exteriors. Solvents are volatile organic compounds (VOC) used to dissolve‚ suspend or change the physical properties of other materials. They are generally used to bring down the viscosity of paints to the desired level‚ which also reduces the cost of paint formation. They constitute 70%-75% of the paint liquid and ultimate escapes into the atmosphere when the fluid dries. Solvents such as ethylene glycols and alcohols are finding wider use as co-solvents in new water-borne formulations. Binders
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different units of measurement of density? (b) Explain how the relative density of a liquid is found using specific gravity bottle. (c) A metal casting is expected to have a specific gravity of 7.5. Due to entrap air bubbles the actual specific gravity was found to be 6.5. What percentage of the casting filled with air? (Neglect the mass of air in calculation). Q2 (a) Write down the relationship for the dynamic viscosity of fluid in terms of velocity gradient and the shear stress and name its terms with
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shape in gas metal arc welding. 18. Kumar‚ A.‚ and DebRoy‚ T. 2004. Guaranteed fillet weld geometry from heat transfer model and multivariable optimization 19. Trapaga‚ G.‚ and Szekely‚ J. 1991. Mathematical modeling of the isothermal impingement of liquid droplets in spraying processes. 20. Zheng‚ L. L.‚ and Zhang‚ H. 2000. An adaptive level set method for movin-boundary 21. Wang‚ Y.‚ and Tsai‚ H. L. 2001. Impingement of filler droplets and weld pool dynamics during gas metal arc welding process. 22
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Transport or transportation is the movement of people‚ animals and goods from one location to another Transport modes are the means by which people and freight achieve mobility‚ that is moving from one point to another for various reasons. Transport is important since it enables trade between peoples‚ which in turn establishes civilizations. Mode of transport (or means of transport or transport mode or transport modality or form of transport) is a term used to distinguish substantially different
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Introduction There were two presentations made with this group. The first was Materials and Properties‚ which was aimed at a year 4 class. The second presentation was Living and Non-Living things which was aimed at a year 3 class. These presentations were to engage students with the topics and give the group a chance to present a science lesson. Engagement of students in science is important‚ as it is essential for their future (Gregson‚ 2012). Science engagement declines as the students’ progress
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EMBELLISHMENT ACCESSORIES WITH SPECIAL TREATMENTS AND MATERIALS DEREK CHUN KIT‚ CHAN BA(Hons) Scheme in Fashion and Textiles (Fashion Design Specialism) INSTITUTE OF TEXILES & CLOTHING THE HONG KONG POLYTECHNIC UNIVERSITY EMBELLISHMENT ACCESSORIES WITH SPECIAL TREATMENTS AND MATERIALS A Thesis Submitted In Partial Fulfillment of Requirements for the Degree of Bachelor of Arts (Honours) In Fashion and Textile (Fashion Design Specialism) Under the supervision of Dr. Jeanne Tan By Derek
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TUTORIAL CENTRIFUGAL PUMP SYSTEMS by Jacques Chaurette p. eng. copyright 2005 Fluide Design Inc.‚ 5764 Monkland avenue‚ Suite 311‚ Montreal‚ Quebec‚ Canada H4A 1E9 Tel: 514.484.PUMP (7867) E-mail: jchaurette@fluidedesign.com Web site: www.fluidedesign.com page….2 Table of contents 1. Different types of pump systems 2. Three important characteristics of a pump system: pressure‚ friction and flow 3. What is friction in a pump system 4. Energy and head in pump systems 5. Static head 6. Flow rate
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