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.
In the first type, Clathria, water flow is in and out basically through the same tissue mass; thus, the flows are opposing. In the second type, Haliclona, water flow is unidirectional, entering through myriad ostia on the outer surface and exiting through large oscula (chimneys).