enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. ISO 25178 - Wikipedia

    en.wikipedia.org/wiki/ISO_25178

    A consortium of several companies started to work in 2008 on a free implementation of 3D surface texture parameters. The consortium, called OpenGPS [1] later focused its efforts on an XML file format (X3P) that was published under the ISO standard ISO 25178-72.

  3. Surface roughness - Wikipedia

    en.wikipedia.org/wiki/Surface_roughness

    Surface roughness can be regarded as the quality of a surface of not being smooth and it is hence linked to human perception of the surface texture. From a mathematical perspective it is related to the spatial variability structure of surfaces, and inherently it is a multiscale property.

  4. Surface metrology - Wikipedia

    en.wikipedia.org/wiki/Surface_metrology

    Surface metrology is the measurement of small-scale features on surfaces, and is a branch of metrology. Surface primary form, surface fractality, and surface finish (including surface roughness) are the parameters most commonly associated with the field. It is important to many disciplines and is mostly known for the machining of precision ...

  5. Moody chart - Wikipedia

    en.wikipedia.org/wiki/Moody_chart

    In engineering, the Moody chart or Moody diagram (also Stanton diagram) is a graph in non-dimensional form that relates the Darcy–Weisbach friction factor f D, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe. It can be used to predict pressure drop or flow rate down such a pipe.

  6. Walter HWK 109-509 - Wikipedia

    en.wikipedia.org/wiki/Walter_HWK_109-509

    The Walter HWK 109-509 was a German liquid-fuel bipropellant rocket engine that powered the Messerschmitt Me 163 Komet and Bachem Ba 349 aircraft. It was produced by Hellmuth Walter Kommanditgesellschaft (HWK) commencing in 1943, with licensed production by the Heinkel firm's facilities in Jenbach, Austria.

  7. Messerschmitt Me 163 Komet - Wikipedia

    en.wikipedia.org/wiki/Messerschmitt_Me_163_Komet

    The Messerschmitt Me 163 Komet is a rocket-powered interceptor aircraft primarily designed and produced by the German aircraft manufacturer Messerschmitt.It is the only operational rocket-powered fighter aircraft in history as well as the first piloted aircraft of any type to exceed 1,000 kilometres per hour (620 mph) in level flight.

  8. Oren–Nayar reflectance model - Wikipedia

    en.wikipedia.org/wiki/Oren–Nayar_reflectance_model

    Diagram of surface reflection. The surface roughness model used in the derivation of the Oren-Nayar model is the microfacet model, proposed by Torrance and Sparrow, [2] which assumes the surface to be composed of long symmetric V-cavities. Each cavity consists of two planar facets.

  9. Contact mechanics - Wikipedia

    en.wikipedia.org/wiki/Contact_mechanics

    Bowden and Tabor were the first to emphasize the importance of surface roughness for bodies in contact. [10] [11] Through investigation of the surface roughness, the true contact area between friction partners is found to be less than the apparent contact area. Such understanding also drastically changed the direction of undertakings in tribology.