Experimental and Numerical Investigation of Pizometric Head and Water Surface Profile of Steady Flow in Porous Media

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Hajikazemian Hassan; Bazargan Jalal

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Journal Paper

Paper Information

Journal: CIVIL INFRASTRUCTURE RESEARCHES Year:2024 | Volume:10 | Issue:1 Page(s): 1-13

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Information Journal Paper

Title

Experimental and Numerical Investigation of Pizometric Head and Water Surface Profile of Steady Flow in Porous Media

Author(s)

Hajikazemian Hassan | Bazargan Jalal | Issue Writer Certificate

Keywords

Drag force

Gradual varied flow

Porous media

Water surface profile

Pizometric head

Abstract

In this article, pressure on the floor and water surface profile at steady flow in rockfill material (coarse grain aggregate) is survived experimentally and numerically. Porous media with small, medium and coarse grading was prepared in a 15 meter length, 1 meter wide and 0.8 meter height laboratory open channel. Pressure changes with pizometers which are installed on bed and water depth with reading from channel side are recorded. Steady flow is established with 3 flows and 12 tests are done totally. Based on experimental data coefficients of binominal relation are calculated with accuracy. Gradual varied flow relations have been used as governing equations. Based on recorded data, there is significant different between pizometric and water depth which amount of that is less in first of media and reach to maximum in end points. Frictional loose of drag force is reason of this deference. In the following, with solving of energy equation, pressure depth in all points is calculated with accuracy and then with applying of the mentioned energy loose, water depth and water surface profile are calculated. As a results, average error of pizometeric head in whole tests is 3.3 percent and mean error of water profile calculation are 2.36 and 13.44 percent for with and without considering of drag force effect Respectively.

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