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Navier-Stokes equation or Navier-Stokes equations

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Old   November 14, 2009, 11:26
Default Navier-Stokes equation or Navier-Stokes equations
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Takaaki Kono
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Which is correct, "Navier-Stokes equation" or "Navier-Stokes equations?"
There is a large number of people who use plural form for this equation.
With regard to "energy equation," most people use singular form.
Does anyone know the reason?
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Old   November 14, 2009, 12:50
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Paolo Lampitella
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The "Navier-Stokes equations" are 3 equations, one for each momentum component. Some people also use this term to indicate the 3 momentum equations + the energy equation
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Old   November 14, 2009, 13:11
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Dear sbaffini,
Thank you for your prompt reply.
I understand the reason.
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