Resting size

Rest value (sometimes also rest value , English designation: stagnation or reservoir conditions ) is a physical term from fluid mechanics .

A quiescent variable denotes the value that a state variable describing the flow assumes or would assume if the flow is or would be decelerated isentropically from a certain point under consideration , i.e. without loss, to zero speed. Measurements can be used to record rest values ​​in stagnation points or a pressure vessel .

The rest parameters include:

• the resting pressure
• the resting temperature
• the enthalpy of rest
• the rest density.

literature

• J. Zierep: Theoretical Gas Dynamics. 4th edition. G. Braun, Karlsruhe 1991, ISBN 3-7650-2042-7 .
• HW Liepmann, A. Roshko: Elements of Gasdynamics. John Wiley & Sons, 1957. (Reprint: Dover Publications, Mineola, NY 2001, ISBN 0-486-41963-0 .)

Web links

• From the lecture on fluid mechanics (FH-Stralsund) (PDF; 7.7 MB)