# converge problem

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July 13, 2014, 01:26
converge problem
#1
New Member

mahdi
Join Date: May 2014
Posts: 14
Rep Power: 3
hi
my numerical simulation by ansys fluent15 .but i can not get a good simulation.i can not get Static pressure distributions along the central symmetrical line of the scramjet isolator with a constant cross sectional area for back pressures 100 kp. my domain is a quarter of the original geometry.in my domain Using tow symmetry boundary conditions and tow wall boundary condition
mesh is 69*69*261 in (Depth,Height and length, respectively)

simulation Boundary conditions and solution setup is:
solver=pressure-based
model: standard k- epsilon

energy=on

near wall treatment:standard wall function

material:air ideal gas

boundary condition:
inlet pressure inlet

Total Pressure = 196000 [Pa

Static Pressure = 25050 [Pa

thermal=300 k

: outlet

pressure outlet =100 [kPa
thermal=300 k
wall
No Slip Wall

solution method=

pressure-velocity copling

sheme=coupled

spatial discrezation=secund order upwind

and enable pseudo transint

solution control

pseudo transint explicet relaxtion factor=

pressure=0.5

momentume=0.5

density=0.5

energy=0.75

turbulent kinitic energy and dissipation rate=0.9

solution initialization=hybrid

my rsedual not converged

Thank you

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