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Numerical Simulation of Transient Diabatic Pipe Flow by using the Method of Characteristics
Enrico Pasquini, FLUIDON GmbH, Aachen, Germany
Heiko Baum, FLUIDON GmbH, Aachen
David van Bebber, Ford Forschungszentrum Aachen GmbH
The following paper presents a one-dimensional numerical model for simulating
transient thermohydraulic pipe flow based on the Method of Characteristics. In addition
to mass and momentum conservation, the proposed scheme also guarantees
compliance with the laws of thermodynamics by solving the energy equation. The
model covers transient changes in fluid properties due to pressure changes, heat
transfer and dissipation. The presented methodology also allows the computation of
the transient temperature distribution in the pipe wall through an additional ordinary
finite difference scheme. The numerical procedure is implemented in the commercial
simulation software DSHplus. The capability of the code is examined by comparing the
simulation results with theoretical solutions and experimental data.