The Hazen–Williams equation is an empirical formula which relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction. It is used in the design of water pipe systems such as fire sprinkler systems, water supply networks, and irrigation systems. The Hazen–Williams equation has the advantage that the coefficient C is not a function of the Reynolds number, but it has the disadvantage that it is only valid for water.
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- The Hazen–Williams equation is an empirical formula which relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction. It is used in the design of water pipe systems such as fire sprinkler systems, water supply networks, and irrigation systems. The Hazen–Williams equation has the advantage that the coefficient C is not a function of the Reynolds number, but it has the disadvantage that it is only valid for water. Also, it is not able to account for the temperature or viscosity of the water..
- L'équation de Hazen-Williams est une relation empirique utilisée en hydraulique pour calculer les pertes de charge dues à la friction dans une conduite hydraulique. Elle est définie en unités SI par l'expression suivante : <math>Q = 0,849 \; C \, A \, R_h^{0,63} \, S^{0,54}</math> dans laquelle : Q est le débit volumique dans la conduite, exprimé en m/s C est le coefficient de rugosité de Hazen-Williams du matériau constituant la conduite, nombre sans dimension dont quelques valeurs sont données dans le tableau suivant : A est l'aire de la section de conduite, exprimée en m Rh est le rayon hydraulique de la conduite, exprimé en m S est le gradient d'énergie hydraulique, défini par <math>\textstyle S = \frac{h_{amont} - h_{aval}}{L}</math> avec h la charge exprimée en hauteur équivalente de la colonne de liquide, et L la longueur de la conduite. S est donc un nombre sans dimension.
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- The Hazen–Williams equation is an empirical formula which relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction. It is used in the design of water pipe systems such as fire sprinkler systems, water supply networks, and irrigation systems. The Hazen–Williams equation has the advantage that the coefficient C is not a function of the Reynolds number, but it has the disadvantage that it is only valid for water.
- L'équation de Hazen-Williams est une relation empirique utilisée en hydraulique pour calculer les pertes de charge dues à la friction dans une conduite hydraulique.
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- Hazen–Williams equation
- Équation de Hazen-Williams
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