μ[u(adsbygoogle = window.adsbygoogle || []).push({}); _{yy}+ u_{zz}] - ∂p/∂x = 0 ... (1)

∂u/∂x = 0 ;

i tried assuming u(y,z) = Y(y)Z(z)

so (1) becomes ... μ[ZY_{yy}+ YZ_{zz}] - ∂p/∂x = 0

hence (1/Y)*Y_{yy}+ (1/Z)*Z_{zz}= (R/YZ) = -λ^{2}

where, R = (1/μ)*∂p/∂x

now Y_{yy}+ λ^{2}Y = 0 ... can be solved easily but what about the remaining part .... i couldn't solve it due to the constant ...

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# Help me solving this differential equation please

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