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Analysis of Flow Fields in a Flexible Tube with Periodic Constriction

Numerical techniques based on pressure-velocity formulation have been adopted to solve approximately, the governing equations for viscous flows through a tube (simulating an artery) with a periodic constriction. The effect of the constriction as well as the rigid of the tube, on the flow characteristics, and its consequences for arterial disease is the focus of this investigation. The unsteady incompressible Navier-Stokes equations are solved by using the finite-difference technique in staggered grid distribution. The haemodynamic factors like wall shear stress, pressure and velocity are analyzed through their graphical representations. Maximum resistance is attained in case of rigid stenosed tube rather than the flexible one. The main result is to contribute that the recirculating region is larger in case of a rigid tube than that of flexible one. Key words: Periodic constriction, pressure-velocity approach, complaint wall, finite difference scheme MSC 2010 No.: 76D, 74S20 2045

Stability of fluid flow in a flexible tube to non-axisymmetric ...

Department of Chemical Engineering, Indian Institute of Science, Bangalore 560 012, India (Received 17 June 1998 and in revised form 25 October 1999) The stability of fluid flow in a flexible tube to non-axisymmetric perturbations is analysed in this paper. In the first part of the paper, the equivalents of classical theorems of hydrodynamic stability are derived for inviscid flow in a flexible tube subjected to arbitrary non-axisymmetric disturbances. Perturbations of the form vi = ˜i exp [ik(x − ct) + inθ] are imposed on a steady axisymmetric mean flow U(r) in v a flexible tube, and the stability of mean flow velocity profiles and bounds for the phase velocity of the unstable modes are determined for arbitrary values of azimuthal wavenumber n. Here r, θ and x are respectively the radial, azimuthal and axial coordinates, and k and c are the axial wavenumber and phase velocity of disturbances. The flexible wall is represented by a standard constitutive relation which contains inertial, elastic and dissipative terms. The general results indicate that the fluid flow in a flexible tube is stable in the inviscid limit if the quantity UdG/dr > 0, and could be unstable for UdG/dr < 0, where G ≡ rU /(n2 + k 2 r2 ). For the case of Hagen–Poiseuille flow, the general result implies that the flow is stable to axisymmetric disturbances (n = 0), but could be unstable to non-axisymmetric disturbances with any non-zero azimuthal wavenumber (n = 0). This is in marked contrast to plane parallel flows where two-dimensional disturbances are always more unstable than three-dimensional ones (Squire theorem).

Universal Grinding Machine - Thin Section

Universal Grinding Machine for Rubbing and Thin Sections Housing: Made of stainless steel, stain-resistant and powder-coated. The mechanic parts are made from anodized aircraft aluminum. Drive: Particularly solid and high-class, extremely softly running brushless DC motor 100 VA, 24V with high torque. The rotational speed goes from 0 up to 300 rpm; infinitely variable speed regulation, smooth start with clockwise and anti-clockwise rotation. Automatic coolant system: Reversible from water off, water permanently on, water on only when grinding. Water collection pan: Made of stainless steel, height-adjustable with water discharge hose. The machine can be modified with grinding discs SystemAbele® or by means of optional magnetic discs within a few seconds for all polishing and grinding discs which are available on the market, having a diameter of 250 mm. Width: ca. 37cm Length: ca. 38cm Height: ca.27cm Weight: ca. 15kg Connections: Power supply 230V/24V, foot-operated connection, feed hose 3/4", drain hose 14mm A convenient foot switch is optional. When purifying 6 nozzles rinse sufficient water onto the grinding disc. The rubber lips remove the water 3 times with any rotation and the dirt is pushed to the sides. This process reduces wear of the grinding disc and prevents grooves in thin section. Rubbing Barely simple exchange of the self-centering discs within seconds Making thin sections Barely simple convertible to optional discs within seconds for using any magnetic discs of diameter 25 cm .

TIMS FORD LAKE AREA - Tennessee State Parks

Broadview. To Fayetteville, TN and Huntsville, AL. To Tullahoma,. Shelbyville, and Nashville. £¤. 41A. Lost C reek Rd. Chestnut Ridge Rd. O ld Tullahom a R d. WARNING TO SAILBOATERS Do not come within 15 feet of aerial powerline crossings to prevent possible contact or electrical arcing. 8 ig Harmony " WATER SAFETY TVA encourages the public to practice water safety procedures. Significant water-use hazards exist above and below TVA dams where waters often rush over spillways and through sluice gates, lock culverts, and turbines. Many of these operations are automatic and occur without warning. Boaters should obey all loading signs posted in these areas and wear Coast Guard-approved life preservers at all times. H Co o. nC o re k li Broadview Mile 155 d R d Rd 26 : Murray Lake Estates p Ma n sf o rd Unless otherwise indicated, all vessels operating within 300 feet of a commercial boat dock must do so at a slow, no-wake speed regardless of whether or not the area is marked by buoys. E Dry C re ek R a m rd R d : : 19 E r : 23 Mile 150 GOOSE ISLAND E 8 24 Elklore Pine Bluff 14 : 41A £ ¤ k ree y C Dr eR Cline Ridge Beginning January 1, 2005, persons born on or after January 1, 1989, must have proof of the successful completion of a nationallyapproved boating safety course accepted by Tennessee to operate any watercraft.

Instruction Manual DCS230T DCS232T
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Read this instruction manual carefully before putting the chain saw into operation and strictly observe the safety regulations! Only persons who have completed training in working from elevated platforms (cherry pickers, lifts), from platforms mounted on ladders or who are proficient in climbing with ropes are permitted to operate this chain saw. Keep this Instruction Manual! Thank you for purchasing a MAKITA product! Table of contents Congratulations on choosing a MAKITA chain saw! We are confident that you will be satisfied with this modern piece of equipment. Packing......................................................................................................2 Delivery inventory ....................................................................................3 Symbols ....................................................................................................3 The DCS230T and DCS232T (Tophandle) are very light and handy chain saws with the handles on the top. These models were developed especially for tree surgery and care. Only persons who have completed training in working from elevated platforms (cherry pickers, lifts), from platforms mounted on ladders or who are proficient in climbing with ropes are permitted to operate these chain saws. Page SAFETY PRECAUTIONS General precautions..............................................................................4 Protective equipment ............................................................................4 Fuels / Refuelling ..................................................................................4 Putting into operation ............................................................................4 Kickback ................................................................................................5 Working behavior/Method of working .................................................5-6 Transport and storage ...........................................................................6 Maintenance..........................................................................................6 First aid .................................................................................................7 Technical data ..........................................................................................7 Denomination of components ................................................................8 The automatic chain lubrication with variable-flow oil pump and maintenance-free electronic ignition ensure trouble-free operation, while the hand-saving anti-vibration system and ergonomic grips and controls make work easier, safer, and less tiring for the user.

Instruction Manual
by januar 0 Comments favorite 2 Viewed Download 0 Times

Read this instruction manual carefully before putting the chain saw into operation and strictly observe the safety regulations! Keep this instruction manual! 1 Thank you for purchasing a MAKITA product! Table of contents Congratulations on choosing a MAKITA chain saw! We are confident that you will be satisfied with this modern piece of equipment. EU conformity declaration ................................................. 2 Packing ................................................................................ 2 Delivery inventory .............................................................. 3 Symbols ............................................................................... 3 The DCS4600, DCS500, DCS5001 are very handy and robust chain saws with a new Design. The automatic chain lubrication with variable-flow oil pump and maintenance-free electronic ignition ensure trouble-free operation, while the hand-saving anti-vibration system and ergonomic grips and controls make work easier, safer, and less tiring for the user. MAKITA chain saws DCS4600, DCS500, DCS5001 are equipped with the latest safety features and meet all national and international standards. These features include: hand guards on both handles, grip throttle lever lock, chain catch, safety saw chain, and chain brake. The chain brake can be actuated manually, and is also inertia-actuated automatically in case of kickback. The following industrial property rights apply: WO 01/77572, DE 10191359, DE 20219246, DE 20300769, US 2003/0152471, TO 2001 A 000338, TO 2004 A 000015, EP 1428637. In order to ensure the proper functioning and performance of your new chain saw, and to safeguard your own personal safety, it is imperative that you read this instruction manual thoroughly before operation. Be especially careful to observe all safety precautions! Failure to observe these precautions can lead to severe injury or death!

tHE AnnE forD SCHoLArSHIP
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The National Center for Learning Disabilities is seeking applicants for the 2013-2014 Anne Ford Scholarship. The Anne Ford Scholarship is a $10,000 ($2,500/year over four years) award granted to a graduating high school senior with a documented learning disability who will be enrolled, in the fall of 2014, in a full-time bachelor’s degree program. The ideal Anne Ford Scholar is a student who:• Articulates his/her LD and clearly demonstrates the importance of self-advocacy • Is committed to completing a four-year college degree and has begun to set realistic career goals • Participates in school and community activities • Has demonstrated academic achievements consistent with college and career goals • Plans to contribute to society in ways that increase opportunities for individuals with LD • Excels as a role model and spokesperson for others who struggle with LD • Demonstrates financial need Eligibility & Selection Criteria To be eligible for the 2013-2014 Anne Ford Scholarship, an applicant must:...

Gas Built-In Ranges - Home Depot
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Weight – 250 Lbs. Rating – 120V / 60 Hz / 15 Amps • Connected Load (kW Rating) @ 120 Volts = 1.2 kW (For use on adequately wired 120V, dedicated circuit having 2-wire service with a separate ground wire. Appliance must be grounded for safe operation.) • Amps @ 120V = 10 Amps • Always consult local and national electric and gas codes. • Make sure all wall coverings around range can withstand heat generated by range. • Linoleum or any other synthetic floor covering located beneath range, must be capable of withstanding minimum heat of 90° F above room temperature without shrinking, warping or discoloring. Insulating pad or 1/4"-thick plywood required between range and a carpeted floor. • Do not obstruct flow of combustion air at oven vent nor around base or beneath lower front panel of range. Range requires fresh air for proper burner combustion. • Range ships with 3/4" factory regulator. • LP Gas conversion kit supplied. • Gas supply piping can be routed through side wall of right cabinet. Right side cabinet is ideal location for main shutoff valve.

Cost Effective Yet Reliable FoIP Solution To Enterprises Worldwide

Ecosmob Introduces VoIP Solutions to Improve Scalability and Work-flow Of Several Enterprises. Their seamless FoIP solution serves the purpose of traditional Fax machines and hence, many enterprises get real-time fax communication.

2015 Ford F150 Innovations
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http://bloomingtonford.com/inventory/view/2015/Make/Ford/New/SortBy0/ | The 2015 F-150 pickup truck is one of the most innovative and important vehicles in decades. It has more than 100 patents on the vehicle, and it is made using aluminum rather than steel for the body. These innovations make the truck more efficient, streamlined, and effective.

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