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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.
The Stanton number, St, is a dimensionless number that measures the ratio of heat transferred into a fluid to the thermal capacity of fluid. The Stanton number is named after Thomas Stanton (engineer) (1865–1931). [1] [2]: 476 It is used to characterize heat transfer in forced convection flows.
Most charts or tables indicate the type of friction factor, or at least provide the formula for the friction factor with laminar flow. If the formula for laminar flow is f = 16 / Re , it is the Fanning factor f , and if the formula for laminar flow is f D = 64 / Re , it is the Darcy–Weisbach factor f D .
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In dimensional analysis, the Strouhal number (St, or sometimes Sr to avoid the conflict with the Stanton number) is a dimensionless number describing oscillating flow mechanisms. The parameter is named after Vincenc Strouhal , a Czech physicist who experimented in 1878 with wires experiencing vortex shedding and singing in the wind.
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In his 1952 paper "A Chart Method for Simplifying Truth Functions", [2] Veitch described a graphical procedure for the optimization of logic circuits, which is referred to as Veitch chart. A year later (in 1953), the method was refined in a paper by Maurice Karnaugh [3] into what became known as Karnaugh map (K-map) or Karnaugh–Veitch map (KV ...
Wilayah berwarna cokelat menjodohkan boson (merah) dengan fermionnya (ungu dan hijau). Harap perhatikan bahwa massa beberapa partikel bisa berubah sesuai hasil evaluasi para ilmuwan. Nilai yang dipakai diagram ini berasal dari data tahun 2024 dan mungkin sudah diubah sejak saat itu.