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- - **Natural / free convection over vertical plate**
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Natural / free convection over vertical plate5 Attachment(s)
Hello everyone,
My problem is to determine the velocity and temperature profile for free convection over a vertical plate for varying properties of the fluid for constant heat flux. I have accounted for the variation, in the form of a quadratic equation using properties from the website below: http://webbook.nist.gov/cgi/fluid.cg...m&RefState=DEF Domain:0.15m*0.04m Presure based solver,Steady state.Energy and LAMINAR equation turned on Boundary conditions: INLET:Gauge pressure=7500000 Pa Backflow temperature=298 K OUTLET:Gauge pressure=7500000 Pa Backflow temperature= 298 K PLATE:constant heat flux=1000 W/m2 Far end opposite to plate:Symmetry I have attached the rest of them. Attachment 24657 Attachment 24658 Attachment 24659 Attachment 24660 Attachment 24661 Questions: 1.Is this the right way of inputting properties in fluent? 2.Wall temperature should be in range 298-302.But in mine varies between 306-313. 3.If gauge pressure is 75bar at inlet and outlet, should the operating pressure be "0 Pa"? 4.Solution hasn't converged yet.It so happens that when i select compute from all zones in the initialization menu fluent changes the initial pressure to half of 75bar and initializes it, but my solution converges at some iteration.Basically a value below 75bar yields(i have tried 74bar) yields some convergence.Why is this so? Can someone please have a look at it and help?:( |

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