Conditions commonly identified by chest radiography. 1  Pneumonia. 2  Pneumothorax. 3  Interstitial lung disease. 4  Heart failure. 5  Bone fracture. 6  Hiatal hernia.
Helicoidal flow is the cork-screw-like flow of water in a meander.It is one example of a secondary flow.he helicoidal motion of the flow aids the processes of hydraulic action and corrasion on the outside of the meander, and sweeps sediment across the floor of the meander towards the inside of the meander, forming point bar deposits.
Meanders are perpetuated through a process called helicoidal flow. As the surface flow of water hits the outer bank it corkscrews, flows along the river bed then deposits eroded material on the inner bank.Step 5.eanders are perpetuated through a process called helicoidal flow. As the surface flow of water hits the outer bank it corkscrews, flows along the river bed then deposits eroded material on the inner bank. Step 5.