Minor Losses http://www.fluidon.com/index.php?id=392[4/13/2015 12:29:30 PM] Home Software Services Applications News & Events Support Downloads Company © 2015 FLUIDON GmbH Services Knowledge Base Network Pressure Losses Hydraulic Line Resonance Pulsation Dampers Water Hammer Simulation Engineering Services Simulation Services Program Services Workshops Search Common Data privacy statement Impressum / Disclaimer Contact Sitemap Login Username: Password: Forgot your password? Friction Losses Minor Losses Although they often account for a major portion of the total pressure loss, the additional losses due to entries and exits and fittings are traditionally referred to as minor losses. These losses represent additional energy dissipation in the flow, usually caused by secondary flows induced by curvature or recirculation. The coefficient of flow resistance is defined as the ratio of the total energy lost over the given segment to the kinetic energy in the section. For the case of uniform distribution of static pressure and density over the segment but which are variable along the flow the coefficient is: Flow resistance coefficients can be expressed in terms of the upstream or downstream velocity of the component. In DSHplus the base area for all flow resistances based on the smallest cross sectional area of the component hence the largest velocity. As a consequence of the strong dependence of resistance coefficients onto specific component geometry, there are many different equations available to calculate such resistance coefficients. Although DSHplus is offering several basic elements the program can not cover all possibly required geometries. For this reason DSHplus is providing template components that can easily be adapted to the user's specific geometry. However, using such resistance components in a series connection, to model one owns network or flow channel topology, it has to be noted, that in real world applications there are interactions between the different geometry sections. Such interactions are not automatically covered by the minor resistances components. Impressions of Click here for images Click here for presentations

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Minor Losses

http://www.fluidon.com/index.php?id=392[4/13/2015 12:29:30 PM]

Home Software Services Applications News & Events Support Downloads Company

2015 FLUIDON GmbHServices

Knowledge Base

Network Pressure Losses

Hydraulic Line Resonance

Pulsation Dampers

Water Hammer Simulation

Engineering Services

Simulation Services

Program Services

Workshops

Search

Common

Data privacy statement

Impressum / Disclaimer

Contact

Sitemap

Login

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Password:

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Friction Losses Minor Losses

Although they often account for a major portion of the total pressure loss, the additional losses due to entries and exits and fittings are traditionally referred to as minor losses.

These losses represent additional energy dissipation in the flow, usually caused by secondary flows induced by curvature or recirculation.

The coefficient of flow resistance is defined as the ratio of the total energy lost over the given segment to the kinetic energy in the section.

For the case of uniform distribution of static pressure and density over the segment but which are variable along the flow the coefficient is:

Flow resistance coefficients can be expressed in terms of the upstream or downstream velocity of the component. In DSHplus the base area for all flow resistances based on the smallest cross sectional area of the component hence the largest velocity.

As a consequence of the strong dependence of resistance coefficients onto specific component geometry, there are many different equations available to calculate such resistance coefficients. Although DSHplus is offering several basic elements the program can not cover all possibly required geometries. For this reason DSHplus is providing template components that can easily be adapted to the user's specific geometry.

However, using such resistance components in a series connection, to model one owns network or flow channel topology, it has to be noted, that in real world applications there are interactions between the different geometry sections. Such interactions are not automatically covered by the minor resistances components.

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Click here for images

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