APPENDIX C – Attenuation of Pressure
Surge Analysis and the Wave Plan Method
Supplementary Material: Example Problems and Solutions
Appendix C – Problem 10
C.10 As illustrated in Chapter 1, the reflection coefficient for pressure waves at reservoir boundaries is -1. That is, a pressure wave of +100m will be reflected off a reservoir boundary as a -100m wave.
Section C.3 (Attenuation of Pressure) presents several cases that compared results from different mathematical models with pressures measured on an experimental laboratory scale reservoir-pipe-valve pipeline system. Case 6 compared results from a model that use steady friction alone with measured values (Figure C.9, reproduced here for continuity). However, the model used a reflection coefficient of -0.945 instead of -1.0 at the reservoir boundary.
Under what circumstances should a reservoir node not be considered a true reservoir boundary with a reflection coefficient of -1.0?
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