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Numerical analysis of steady turbulent triple jet flow with temperature difference

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Abstract

The numerical predictions confirm a new classification of flow patterns of triple jet interaction. The addition of side jets increase the rate of decrease of the centreline velocity for the flow of type A and decreases in the other cases. The effect of various types of flow on the rate of decrease of the velocity, the turbulent kinetic energy and the temperature in the combined region are detailed. Several correlations are proposed.

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Abbreviations

a:

Slot nozzle width (m)

Do :

Distance between two nozzles (m)

x, y:

Streamwise and transverse coordinate (m)

xS :

Stagnation point (m)

y0.5 :

Half width of the jet (m)

U:

Mean velocity in the x-direction (m s−1)

V:

Mean velocity in the y-direction (m s−1)

Ui, Uj :

Velocities components (m s−1)

U0 :

Jet exit mean velocity (m s−1)

U0C :

Central jet exit velocity (m s−1)

U0S :

Side jet exit velocity (m s−1)

\(\overline{{u_{i} u_{j} }}\) :

Reynolds stress component (m2 s−2)

Re:

Reynolds number

P:

Mean pressure (Pa)

T:

Mean temperature (K)

k:

Turbulent kinetic energy (m2 s−2)

λ:

Nozzle discharge velocity ratio

ω:

Specific dissipation rate (s−1)

ε:

Dissipation of turbulent energy (m2 s−3)

μ:

Dynamic viscosity (Kg m−1 s−1)

ν:

Kinematic viscosity (m2 s−1)

νt :

Turbulent eddy viscosity (m2 s−1)

νe :

Effective viscosity (m2 s−1)

ρ:

Density of air (Kgm−3)

t:

Turbulent

w:

Wall

C:

Cold temperature

H:

Hot temperature

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Authors and Affiliations

  1. Theoretical and Applied Laboratory of Fluid Mechanics, Faculty of Physics, University of Science and Technology Houari Boumedienne - USTHB, Algiers, Algeria

    Nassira Nouali & Amina Mataoui

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  1. Nassira Nouali
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  2. Amina Mataoui
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Correspondence to Amina Mataoui.

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Nouali, N., Mataoui, A. Numerical analysis of steady turbulent triple jet flow with temperature difference. Heat Mass Transfer 52, 315–330 (2016). https://doi.org/10.1007/s00231-015-1537-z

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