Recent content by westmckay99

Hi, Thanks for the reply! However, I'm unsure as to how your comment applies to my question. The scenario I refer to has longitudinal constraints. The thermal expansion in the radial direction I understand but how is it there's also a mechanical contribution (they use the poisson ratio times the...

Hi, thanks for the reply! I completely understand that thought experiment, however I see a flaw: the imaginary step of letting it expand longitudinally offsets the compression afterwards, ie it may expand in the transverse direction when you compress it back down but it had already contracted by...

I have a conceptual misunderstanding it seems. Poisson's ratio is the ratio of elastic strain deformation of the transverse and longitudinal components. That being said, if I were to induce thermal stress (heating up) to a rod by keeping its ends (longitudinal component) rigid, would there be a...

ζxy? I used ζyx as the shear stress pointing in the y direction due to flow in the x direction. Since there is no flow in y, shouldn't ζxy=0?

Thanks again for the help. How is it that when I perform a momentum shell balance instead, I get different results: taking the +ve y direction to be pointing down instead Momentum due to flow @ x=0, (ρWΔyv_{x}v_{x})|_{x=0} @ x=L, (ρWΔyv_{x}v_{x})|_{x=L} Momentum due to viscous...

Thanks for the reply! Could you please explain as to why there would be two shear stresses going in opposite directions here? The top surface is a liquid-gas interphase which experiences zero shear, only the bottom surface experiences shear stress due to the liquid-solid interphase boundary...

Hello everyone, I have a concern regarding the conservation of momentum for an incompressible Newtonian fluid with constant viscosity. Say you have a volume of fluid sliding down an inclined plane with a velocity Vx with the perpendicular axis facing upward in the y-direction. When you try...