The County Commissioners are so excited to finally be able to share this news with everyone! Crystal Steel is a wonderful company that will create 126 new, good paying jobs in Caroline County and invest $4 million at their Federalsburg location. Thanks to our local Caroline Economic Development Corp. staff, the staff and elected officials of Federalsburg, and the team at the Maryland Department of Commerce for their help in making this happen!
Incompressible flows do not have such a variation of density. The key differentiation between compressible and incompressible is the velocity of the flow. A fluid such as air that is moving slower than Mach 0.3 is considered incompressible, even though it is a gas. A gas that is run through a compressor is not truly considered compressible (in the thermodynamic sense) unless its velocity exceeds Mach 0.3.
A negative pressure (-) is below. The amount of air flowing through a duct is regulated by the amount of pressure difference and by the system resistance. The higher the pressure difference, the greater the air velocity and the greater the quantity of air that will flow from the duct. Friction is a resistance which slows down airflow. The flow of air creates friction as it rubs against the side of the duct, and the friction creates resistance to the airflow. Think of blowing through a piece of garden hose 6 inches long. You can feel a good stream of air coming out of the tube. Now try to blow through a hose 50 feet long.