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In physics, physical chemistry and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids – liquids and gases.It has several subdisciplines, including aerodynamics (the study of air and other gases in motion) and hydrodynamics (the study of water and other liquids in motion).
Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate the free-stream flow of the fluid, and the interaction of the fluid ( liquids and gases ) with surfaces ...
Flow rate may refer to: . Flow measurement, a quantification of bulk fluid movement; Mass flow rate (ṁ or μ), the mass of a substance which passes per unit of time; Volumetric flow rate (Q or ˙), the volume of fluid which passes per unit time
A debit card is used to make a purchase with one's own money. A credit card is used to make a purchase by borrowing money. [20] From the bank's point of view, when a debit card is used to pay a merchant, the payment causes a decrease in the amount of money the bank owes to the cardholder. From the bank's point of view, your debit card account ...