LV 2. Relative roughness r Í Ä (ε in ft, D in ft) ε. D. Moody Diagram. Metzger & Willard, blusunihungan.ga://blusunihungan.ga r. = 5e− r. = 1e− Smooth pipes , r. In engineering, the Moody chart or Moody diagram is a graph in non-dimensional form that . Print/export. Create a book · Download as PDF · Printable version. Pipe Flow. F. IGURE. Moody diagram. Page 2. Fig. The Moody chart for pipe friction with smooth and rough walls. This chart is identical to Eq.
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moody blusunihungan.ga - Download as PDF File .pdf), Text File .txt) or view presentation slides online. moody chart for friction factor. Moody Diagram - Imperial - Free download as PDF File .pdf), Text File .txt) or read online for free. Chapter Flow in Conduits. Flow in Conduits. Turbulent Flow and the Moody Diagram. Turbulent Flow and the Moody Diagram. (Read Chapter 10).
Source Procedure As with many fluid mechanics problems, the first order of business is to determine the Reynolds number of the flow. If you don't have a velocity by which to calculate the Reynolds Number, you will need to assume either a velocity, or a initial friction factor. If you assume an initial velocity, proceed as usual.
If you assume a friction factor I like 0. If done correctly, you will converge at the same answer. Refer to the Moody Chart. If the Reynolds Number falls in the Laminar or Transition range, refer to appropriate equations. If however the flow is in the Turbulent range, we are ready to proceed with the Moody Chart. Compute the relative pipe roughness. This value is the roughness of the pipe, divided by the diameter of the pipe. Find the line referring to your relative roughness on the right side of the diagram.
In the case that your value does not have a printed line, imagine a line paralleling the nearest line representing your relative roughness. Mark this point on the Chart. Using a straight edge, follow the point straight left, parallel to the x axis, until you reach the far left side of the chart.
Read off the corresponding friction factor. Calculate the energy losses knowing the friction factor. Calculate a new velocity and Reynolds Number. Compare your new Reynolds Number with your previous value. If the Reynolds number is appreciably different from your previous value, repeat the calculations with this new Reynolds Value. If however it is close to your previous value, your answer has converged, and you are finished. We see that this is in the Reynolds Number range for turbulent flow, so we proceed with the Moody Chart.
Next, let's say we calculate a unitless relative roughness of 0.
From here we sketch a line following the curve contours, going left, as see in the red line below. We follow this line until you Reynolds number value from before, and mark this point. This is used to identify particular browsers or devices when the access the service, and is used for security reasons.
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