# LES analysis of jets in cross flow

* Corresponding author
Abstract : Jets in cross ﬂow are of fundamental industrial importance and play an important role in the validation of turbulence models. Two jet conﬁgurations are investigated with the TrioCFD code, the CFD reference code of the Nuclear Energy Division of CEA: • A tee junction of circular tubes where a hot jet discharges into a cold main ﬂow, • A rectangular jet marked by a scalar discharging into a main ﬂow in a rectangular channel. The $tee-junction$ conﬁguration is very important for the phenomena of thermal fatigue. The OECD/NEA benchmark on the Vattenfall tee junction ﬂow is analyzed. This test case is selected because, beside the experimental results, various calculation results with several turbulence modelling approaches have been published. A LES modelling and calculation strategy is developed and validated on this data for jets in crossﬂow under thermal fatigue conditions. The rectangular jet conﬁguration is important for basic physical understanding and modelling and has been analyzed experimentally at CEA. The experimental work was focused on the turbulent mixing between a rectangular channel ﬂow with grid turbulence exiting a heated jet into a conﬁned grid turbulent crossﬂow, with both kinematic and passive scalar high quality measurements in order to characterize its statistical properties (energy spectra, Reynolds stresses (anisotropy), PdF). These experiments are analyzed for the ﬁrst time with LES by applying the strategy developed for the Vattenfall conﬁguration. The turbulent inlet boundary conditions are well controlled in both experiment and calculation(grid turbulence). Structured and unstructured tetrahedral grids are used to predict the measured mean values and turbulent ﬂuctuations of the velocity and the temperature.
Keywords :
Document type :
Conference papers
Domain :

Cited literature [11 references]

https://hal-cea.archives-ouvertes.fr/cea-02438721
Contributor : Amplexor Amplexor <>
Submitted on : Friday, February 28, 2020 - 3:44:45 PM
Last modification on : Monday, June 14, 2021 - 10:03:19 AM
Long-term archiving on: : Friday, May 29, 2020 - 12:51:47 PM

### File

201600002674.pdf
Files produced by the author(s)

### Identifiers

• HAL Id : cea-02438721, version 1

### Citation

U. Bieder, P. Errante. LES analysis of jets in cross flow. NUTHOS-11 - The 11th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety, Oct 2016, Gyeongju, South Korea. ⟨cea-02438721⟩

Record views