Some problems in Fluent,Turbulence Viscosity Ratio/ads-0/Face handedness/floating poi
 

Hi,

I am working on simulation of 3D heat exchanger,recuperator, and analysis of flow,turbulence etc.Both internal and external are available.

I have check mesh and the results:

Min skewness :2.699e-4
Max skewness: 0.9688

Min orthogonal quality:0.100481
Max. orthogonal quality : 0.99966 ( I have press control and would like to change max. orthogonal quality as 0.1 is but can't enable me to change it)

in boundary conditions of external flow I have changed turbulence viscosity and ratio %1

Maximum aspect ratio : 4.16e+1

Turbulence solver: K-epsilon and energy equation
Solver:Pressure based and steady state
Pressure-Velocity-Coupling : Coupled
Gradient: Green Gauss Node Based
Pressure :Standart
Momentum-Turbulent-Energy: First Order Upwind
Solution Methods: High order term relaxation : 0.1 all variables
Solution Control : Courant Number :30 and in URF turbulence kinetic energy/viscosity/dissipation rate :0.1

in boundary conditions of external flow I have changed turbulence viscosity and ratio %1
in boundary conditions of internal flow I have changed turbulence viscosity %1 and ratio 10



When I have initiated ''Hybrid Initialization, has been shown photos below.

https://imageshack.com/i/paPEEpJup
https://imageshack.com/i/p5A9witGp
https://imageshack.com/i/p3spc5GOp


I would be happy If anoyne can help me.