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Group theoretic approach and analytical solutions of the compressible Navier–Stokes equations

  • *Corresponding author: Dina Razafindralandy

    *Corresponding author: Dina Razafindralandy 
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  • A group theoretic analysis of the compressible Navier-Stokes equations of an ideal gas is carried out. The 12-dimensional Lie symmetry group is computed. The commutation table and the Levi decomposition of its Lie algebra are presented. The equations are reduced and self-similar one-, two- and three-dimensional solutions are computed.

    Mathematics Subject Classification: Primary: 76N06, 22E70, 58D19.

    Citation:

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  • Table 1.  Commutation table of $ -athfrak{g} $

    $X_1$ $X_2$ $X_3$ $X_4$ $X_5$ $X_6$ $X_7$ $X_8$ $X_9$ $X_{10}$ $X_{11}$ $X_{12}$
    $X_1$ 0 0 0 0 $X_2$ $X_3$ $X_4$ 0 0 0 $2X_1$ 0
    $X_2$ 0 0 0 0 0 0 0 0 $-X_4$ $X_3$ $X_2$ $X_2$
    $X_3$ 0 0 0 0 0 0 0 $X_4$ 0 $-X_2$ $X_3$ $X_3$
    $X_4$ 0 0 0 0 0 0 0 $-X_3$ $X_2$ 0 $X_4$ $X_4$
    $X_5$ $-X_2$ 0 0 0 0 0 0 0 $-X_7$ $X_6$ $-X_5$ $X_5$
    $X_6$ $-X_3$ 0 0 0 0 0 0 $X_7$ 0 $-X_5$ $-X_6$ $X_6$
    $X_7$ $-X_4$ 0 0 0 0 0 0 $-X_6$ $X_5$ 0 $-X_7$ $X_7$
    $X_8$ 0 0 $-X_4$ $X_3$ 0 $-X_7$ $X_6$ 0 $-X_{10}$ $X_9$ 0 0
    $X_9$ 0 $X_4$ 0 $-X_2$ $X_7$ 0 $-X_5$ $X_{10}$ 0 $-X_8$ 0 0
    $X_{10}$ 0 $-X_3$ $X_2$ 0 $-X_6$ $X_5$ 0 $-X_9$ $X_8$ 0 0 0
    $X_{11}$ $-2 X_1$ $-X_2$ $-X_3$ $-X_4$ $X_5$ $X_6$ $X_7$ 0 0 0 0 0
    $X_{12}$ 0 $-X_2$ $-X_3$ $-X_4$ $-X_5$ $-X_6$ $-X_7$ 0 0 0 0 0
     | Show Table
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