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LaTeX Math Block
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A = A_1 + A_2



LaTeX Math Block
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s_1 = A_1/A 

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LaTeX Math Block
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s_2 = A_2/A

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LaTeX Math Block
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s_1 + s_2 = 1

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LaTeX Math Block
anchorIKGRE
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u_m = s_1 \cdot \dot u_1 + s_2 \cdot \dot u_2



LaTeX Math Block
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4UAJQ
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q_1 = \dot m_1 / \rho_1 = A_1 \, u_1 \Rightarrow \dot m_1 = \rho_1 \, A_1 \, u_1 

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LaTeX Math Block
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q_2 = \dot m_2 / \rho_2 = A_2 \, u_2 \Rightarrow \dot m_2 = \rho_2 \, A_2 \, u_2

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The areas ratio:




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ORI6M
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s_1 =  \frac{

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\dot m_1

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 \, \rho_2

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\, u_2}{\dot m_1 \, \rho_2 \, u_2

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 + \dot m_2 \, \rho_1 \, u_1}



LaTeX Math Block
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s_2 = \frac{

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1}{1+\omega_{12}} \cdot A = \frac{\dot m_

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2 \, \rho_

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1 \, u_

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1}{\dot m_1 \, \rho_2 \, u_2 + \dot m_2 \, \rho_1 \, u_1}

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For homogeneous 2-phase pipe flow: 

LaTeX Math Inline
bodyu_1 = u_2 = u_m
 and volumetric shares are going to be:


LaTeX Math Block
anchorORI6M
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s_1 =  \frac{\dot m_

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1 \, \rho_

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2 }{\dot m_1 \, \rho_2 

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 + \dot m_2 \, \rho_1 

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}

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LaTeX Math Inline
bodyu_1 = u_2 = u_m

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LaTeX Math Block
anchor

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ORI6M
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s_2 =  \frac{\dot m_2 \, \rho_1}{\dot m_1 \, \rho_2 

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+ \dot m_2 \, \rho_1}




See also

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Physics / Mechanics / Continuum mechanics / Fluid Mechanics / Fluid Dynamics / Fluid Flow / Pipe Flow / Pipe Flow Dynamics / Pipe Flow Simulation

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