Numerical Modeling of Discharge Coefficient of Symmetric and Asymmetric Rectangular Labyrinth Weir by Using FLOW-3D Software

الهی فر, حسین; آقامجیدی, روزبه; امیری, سجاد

doi:10.30482/jhyd.2026.557727.1752

Numerical Modeling of Discharge Coefficient of Symmetric and Asymmetric Rectangular Labyrinth Weir by Using FLOW-3D Software

مقالات آماده انتشار

نوع مقاله : مقاله کامل (پژوهشی)

نویسندگان

حسین الهی فر ¹

روزبه آقامجیدی ²

سجاد امیری ³

¹ Dept. of Water Engineering, Islamic Azad University of Kerman Branch, Kerman, Iran

² Civil Engineering, Islamic Azad University, Sepidan Branch, Sepidan, Iran

³ Water Engineering, Sarzamin Sabz Paydar Consulting Engineers Company, Ahvaz, Khouzestan, Iran

10.30482/jhyd.2026.557727.1752

چکیده

A labyrinth weir is an important hydraulic structure used to regulate hydraulic heads and control flow in canals, rivers, and dam reservoirs. FLOW-3D software was used to numerically model symmetric and asymmetric rectangular Labyrinth Weir. The (Cd) permeability coefficient is a function of hydraulically variable factors such as (Ht / P) hydraulic head to weir height ratio, (WL/WR) left to right cycle width ratio, and (B/Wavg) longitudinal weir ratio, according to the results of Buckingham dimensional analysis (The length of the lateral weir crest to the average width of the weir cycle). Experimental tests were performed on a rectangular flume with 8 m length, 0.6 m width, and 0.6 m height, and the researcher modeled it in FLOW-3D software. The results showed that numerical and physical modeling is in good agreement with each other. In symmetrical labyrinth weirs, the discharge coefficient obtained from physical modeling was about 27% higher than numerical modeling. Numerical modeling showed that the discharge coefficient of asymmetric labyrinth weirs is about 16% higher than the discharge coefficient of symmetric labyrinth weirs.

کلیدواژه‌ها

Labyrinth weirs

hydraulic head

discharge coefficient

asymmetric and symmetric rectangular labyrinth weir

موضوعات