Assessment of blends of CO2 with butane and isobutane as working fluids for heat pump applications
arun k
s7 m1
College of Engineering, Trivandrum
2007-11 Batch



Introduction
Eco-friendly natural refrigerants as alternative refrigerants

Due to toxicity of NH3, flammability of hydrocarbons, and high pressure and low COP of CO2, blends are mo ....etc

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Abstract
Purpose: This paper presents the properties of magneto-rheological fluids and their recent applications and development In recent years. This paper particularly deals about the use of MR fluids in shock absorbing system in cars.
Reviews: The theoretical research results of the properties and applications obtained in the past decades and their developments are also reviewed.
Findings: It is very clearly and well understood from the presented paper that replacement of the traditional methods w ....etc

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Electrorheological fluids are suspensions of extremely fine non-conducting particles (up to 50 micrometres diameter) in an electrically insulating fluid. The apparent viscosity of these fluids changes reversibly by an order of up to 100,000 in response to an electric field. For example, a typical ER fluid can go from the consistency of a liquid to that of a gel, and back, with response times on the order of milliseconds. The effect is sometimes called the Winslow effect

The ER effect

The change in apparent viscosity is dependent on the ap ....etc

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electrorheological fluid ppt and pdf file showing its functins and its applicatoin ....etc

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nano fluids have higher heat transfer capability its obvious but the calculations are complex i need help ....etc

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The uniaxial extensional viscosity is a fundamental material property of a fluid which characterizes the resistance of a material to stretching deformations. For microstructured fluids, this extensional viscosity is a function of both the rate of deformation and the total strain accumulated. Some of the most common manifestations of extensional viscosity effects in complex fluids are the dramatic changes they have on the lifetime of a fluid thread undergoing capillary breakup. In a pinching thread, viscous, inertial and elastic forces can all r ....etc

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Presented by:
Clyde Jonathan D’Silva


Super critical Fluids and its Applications
INTRODUCTION
• Definition: Supercritical Fluid is any substance at a temperature and pressure above its Critical point.
• Example: Commonly used Supercritical fluids are CO2 & H2O.
Phase Diagram:
• Few SCF
PROPERTIES OF SCF
• Can penetrate solids like gas.
• Dissolves materials like liquid.
• There is no surface tension in SCF.
• It has a very good solvent property.
• In supercritical en ....etc

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Fluids in Motion


Velocity and Flow Visualization


Primary dependent variable is fluid velocity vector V = V ( r ); where r is the position vector.

If V is known then pressure and forces can be determined.

Consideration of the velocity field alone is referred to as flow field kinematics in distinction from flow field dynamics (force considerations).

Fluid mechanics and especially flow kinematics is a geometric subject and if one has a good underst ....etc

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Important two-phase fluid mechanics problems that are dominated or significantly affected by capillary effects are not oddities but rather daily events in our lives. Seemingly unrelated topics such as the economics of satellite television and pulmonary health and safety research share capillary fluids physics. Current and future miniaturized two-phase heat transfer loops and fuel cells possess similar concerns. This seminar presents research in a number of capillary fluids topics on Earth and in orbit. An energy method code, Surface Evolver, is ....etc

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Hey guys, I'm a Mec undergraduate. Here's my request-->If anyone has information or any report/ppt on the above topic, kindly post them. I'll be grateful!

Regards,
eGeek
....etc

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