Numerical investigation of vorticity and bubble clustering in an air entraining hydraulic jump

an investigation of accuracy and complexity across different proficiency levels in written narrative task

abstract this quasi-experimental study was aimed at examining the impact of storyline complexity on the grammatical accuracy and complexity of advanced and intermediate efl learners. a total of 65 advanced and intermediate efl learners were selected from iran language institute (ili). an intact group including 35 intermediate participants and another intact group with 30 advanced participants ...

an investigation into iranian teachers consistency and bias in evaluation of students writings

while performance-based language assessment has led to an increased authenticity and content validity in the practice of writing assessment, the reliability of ratings has become a major issue. research findings have shown different reactions by native english speaker (nes) and non-native english speaker (nns) teachers to students’ writings. the focus of this study is on investigating whether i...

Numerical simulation of a turbulent hydraulic jump: Characterization of the free interface and large bubble structure

Bubble generation is a ubiquitous and complex phenomenon occurring as a result of non-linear behavior of the free surfaces. Plunging breakers, spilling breakers and plunging jets are just a few scenarios where bubble generation occurs. Due to its complexity and our lack of complete understanding of this phenomenon, the models developed in the literature are far from being predictive (Moraga et ...

Effect of Froude number on bubble clustering in a hydraulic jump

The study of bubble clustering processes may provide a significant insight into turbulent air–water flows. Previous studies investigated these processes in plunging jets, dropshafts and hydraulic jumps. This research investigates the bubble clustering process in hydraulic jumps using experimental data collected in a rectangular horizontal flume with partially developed inflow conditions for inf...

Two-dimensional bubble clustering in hydraulic jumps