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.
This is a derived parameter which quantifies the tendency for airflow in the lower levels of the troposphere to 'corkscrew' and thus encourage the formation of storms with strong mesoscale circulations, possibly leading to tornadic activity. Helicity is related to: (a): speed shear from surface to 3 km (about 700 hPa) - how much the wind speed changes over this altitude band. (b): directional change of the wind over the same altitude band. (c): the strength of the low-level wind contributing to the speed / directional shear (as above). The numerically-greater each of these elements is, the higher is the helicity available for ingestion into a developing storm complex.