Temperature variations with increasing number of iterations
Hi everyone,
Hope you are doing good. I am actually simulating a program in FLUENT with the following settings: Boundary Conditions Velocity:1m/s Turbulent Intensity: 4.5 Hydraulic Diameter: 25.3371 293K [water] 300K [vapour] Meshing Sizing 2mm Mapped Free Meshing Multiphase Eulerian Boiling Model RPI Boiling Model Implicit Viscous Model kepsilon Standard Enhanced Wall Treatment Thermal Effects Per Phase Phases Diameter: sautermean, Drag Coefficient: boilingishii Lift: boilingmoraga Heat: ranzmarshall Mass: boiling Surface Tension: 0.06 Interfacial Area: iaparticle Solution Controls Flow Courant Number: 10 Momentum:1 Pressure:1 Density:1 Body Forces:1 Vaporisation Mass:1 Volume Fraction:0.5 Turbulent Kinetic Energy:0.8 Turbulent Dissipation Rate: 0.8 Turbulent Viscosity:1 Energy:0.8 When I run the simulation for around 300 iterations, the residuals become flat and there are no fluctuations. The output obtained is as desired (temperature, pressure, velocity of water, velocity of vapour). But when I increase the number of iterations, say like, to 1000 then the temperature profile changes drastically keeping the remaining (pressure, velocity of water, velocity of vapour) same as before. Could anyone please help me in knowing what I am doing wrong??? Thanks a lot in advance. 
Have you reached convergence (i.e. have your residuals gone below the convergence criteria)?

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Thanks Meangreen for the prompt reply!!!
Earlier I had set my residuals criteria to 1e6 then it was not converging as most of the parameters became flat after 1e4. So, when I set my residual criteria to 1e3 then it converged. I am attaching the snapshots of the plot when I had set number of iterations to 1000. 
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