List of Articles Orifice Open Access Article Abstract Page Full-Text 1 - Experimental Study of Discharge Doefficient of the Groove upstream of Concrete-Face Rockfill Dam (using Hydraulic Models) zahra rahiminejad sayed habib musavi-jahromi Amir Khosrojerdi Hossien Hassanpour Darvishi Jamal Mohammad Vali Samani 10.30495/wsrcj.2021.18081 Open Access Article Abstract Page Full-Text 2 - Experimental and Numerical Study on Leakage in Orifices of High-Density Polyethylene Pipe Seyed Ali Sadr-Al-Sadati Mohammad Reza Jalili Ghazizadeh 10.22034/jest.2020.31008.3952 Open Access Article Abstract Page Full-Text 3 - Effect of Gradation on Sediment Trapping Efficiency in Structures of Vortex Tube with Different Angles ali asareh sina jamshidi orak Open Access Article Abstract Page Full-Text 4 - Gas Flow Metering Using the PSO Optimized Interval Type- 2 Fuzzy Neural Network Mirhossein Hamedi Kamel Sabahi Open Access Article Abstract Page Full-Text 5 - Increasing degradation degree and solubilization of municipal wastewater secondary sludge to anaerobic digester using hydrodynamic cavitation pretreatment Elahe Abbasi Solmaz Saadat Ayoub Karimi-Jashni mohammad hadi Shafaei