TY  - RPRT
U1  - Arbeitspapier
A1  - Kaufmann, Andre
T1  - Viscous energy transfer in the boundary layer of the vortex tube
N2  - The vortex tube can separate a mass flow into a hot and cold mass flow. In this paper, the energy balance in the boundary layer of the vortex tube is analyzed with respect to a possible effect of temperature separation in the boundary layer by the viscous term of the enthalpy balance equation. A Large Eddy Simulation is used to generate the velocity profiles used for the computation of the viscous source terms. The dominant contributions of the source terms in the boundary layer of the vortex tube are identified and computed from the velocity fields. It is demonstrated how the strong velocity gradients in the boundary layer create a viscous flux of energy. An implementation of balance equations both with and without source term show the effect of energy separation in the boundary layer of the vortex tube.
KW  - Vortex-Rohr
KW  - Hilsch-Rohr
KW  - Boundary layer
KW  - Enthalpie
KW  - vortex tube
KW  - boundary layer
KW  - energy separation
Y1  - 2021
U6  - https://nbn-resolving.org/urn:nbn:de:bsz:747-opus4-3786
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:747-opus4-3786
SP  - 18
S1  - 18
ER  -