2018_EJRNL_PP_F__JAVIER_GARCIA_GARCIA_1.pdf
Terbatas Lili Sawaludin Mulyadi
» ITB
Terbatas Lili Sawaludin Mulyadi
» ITB
An analytic model (AM) describes the dynamical behavior of a Newtonian fluid that is suddenly released to the atmosphere from
a pressurized vessel. The discharge process is a very fast transient phenomenon in which the liquid transits from rest to a highly turbulent
motion, constituting a two-phase flow with a liquid–air interface. The AM has a number of parameters that can be adjusted to conform to
experimental or simulation data. This AM is then used to assess the ability of some relevant computational fluid dynamics (CFD) turbulence
models to simulate the fast transient behavior described by the AM. The detached eddy simulation (DES) k ? ? shear-stress-transport with
scale-adaptive-simulation (SSTSAS) turbulence model provides an acceptable agreement with the AM because it can reproduce the intense
wall friction generated in the transient motion. The CFD results suggest that deceleration plays a very prominent role in generating turbulence
near the wall. The cross-section velocity and turbulence fields profiles for the CFD model are also discussed. DOI: 10.1061/(ASCE)
HY.1943-7900.0001562. © 2018 American Society of Civil Engineers.