Flow Structure in a Compound Meandering Channel With Various Planform and Cross Sections

Key Points

• The aim is to elucidate the flow structure in meandering channels with varying planform and cross-sections.
• Conducted laboratory experiments on a compound meandering channel with varying planforms and cross-sections.
• Applied non-hydrostatic three-dimensional flow analysis to steady flow conditions.
• Investigated the interaction between centrifugal forces and secondary flows in complex channel structures.
• Identified coexistence of secondary flows due to centrifugal effects and flow mixing between high and low water areas.
• Showed that the three-dimensional flow structure varies with different longitudinal channel shapes and cross-sections.
• Proposed that understanding the relationship between flow and bed variations is essential for future research.