Fig. 3
From: On volume-source representations based on the representation theorem
Schematic illustration of our new interpretation: expansion from a to b by ΔV C due to the overpressure ΔP C in the fluid cavity bounded by Σ drives the process. c The internal fluid is replaced by an elastic body V in consisting of the same elastic material as the external medium. V in has the same traction on Σ in as the actual overpressure. The corresponding displacement on Σ in is \({u_{i}^{I}}\), which is different from the actual displacement on Σ. d The internal fluid is replaced by an elastic body V in consisting of the same elastic material as the external medium. A displacement identical to the actual displacement on Σ (b) is applied to V in. The pressure change in \(V^{\prime }_{\text {in}}\) is then ΔP I, which differs from ΔP C