# Is this the correct setup? Non-Newtonian fluent Problem

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 May 4, 2016, 01:57 Is this the correct setup? Non-Newtonian fluent Problem #1 New Member   Join Date: Apr 2016 Posts: 9 Rep Power: 3 Sponsored Links Problem: You have a thickened (non-Newtonian) fluid passing through a water bottle top, where you know the initial pressure is vacuum (0kpa) and the a lab results gives you a flow rate of say 0.000779kg/s and the static pressure drop was seen as 10kPa with laminar flow. (assuming model and mesh is done and fluent set up is only needed) General:Pressure based, Absolute and steady Models: Only viscous (Laminar) Material: fluid is almost like water, copy water poperties and change viscosity to non-Newtonian power law and add parameters Cell Zone conditions: Change it to you non-Newtonian fluid Boundary conditions:Set operation conditions to 0pa Define inlet as Mass-flow-inlet at 0.000779kg/s Define Outlet and Outflow Define interior and walls Solution methods: Use Simple Solution controls: Change nothing Solution Initialization: Hybrid with 10 steps, initialize Run Calculation: run with 250 iterations and what for convergence Wala take results???? Is this correct or have I missed something

 May 9, 2016, 00:59 #2 New Member   Join Date: Apr 2016 Posts: 9 Rep Power: 3 Bump, Please help :/

 May 18, 2016, 01:05 #3 New Member   Join Date: Apr 2016 Posts: 9 Rep Power: 3 Also like to add I am getting a shear rate of crazy amount from a range of 20-10,000 1/s

 May 31, 2016, 11:07 #4 Member   Bhargav Bharathan Join Date: Jun 2015 Location: Montreal, Canada Posts: 56 Rep Power: 4 Hi, Your set up looks fine. I suggest going to monitors and setting the residuals to atleast 1e-5 for better precision. As for the shear rate, where did you arrive at numbers as big as 20-10,000 1/s? I generally give small numbers of the order 0.01. -BB

 June 16, 2016, 20:16 #5 New Member   Join Date: Apr 2016 Posts: 9 Rep Power: 3 I meant strain rate... Sorry somehow I was must have misread it... but for my Wall Shear stress it is around 0 (possible very very small) to 43pa.. Btw thank you for the reply, what I am trying to find is Strain and Shear rate range to determine if the simulation is viable though I am not sure if I am using the right methods to do so.. I am just using Contours and using the range they give me.

 August 31, 2016, 15:43 Yielded and unyielded region in viscoplastic flluid #6 New Member   Join Date: Sep 2014 Posts: 1 Rep Power: 0 Hey Everyone! I'm unable to plot yielded and unyielded region for a flow of viscoplastic fluid in a square enclosure. Help me I'm stuck. Thanks

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