Intake manifold analysis
 

Sever error:a floating point has occurred:floating point exception.
And in the residuals window, all the residuals show solution divergence during the first iterations.
Below is my model information:
Geometry dimension:unit mm
Inlet:Diameter:27àoutlet:ares:380,length:70 àsection of pipe: ares:820 ,length:105;
mesh models:
surfaces remesheràpolyhedral mesheràprism layer mesher
reference values:
base size:5 àprism layer thickness:2.5àrelative minimum size(surface size) :1à relative target size(surface size) :2àothers:default
physical models:
3DàstationaryàsteadyàIdeal gasàsegregated flowàstandard k-Epsilon tuberlenceàhigh y plus wall treatment, click on incompressible in the ideal gas property window.
Reference values:deault
Initial conditions:
Pressure:750pa(half of the pressure difference between inlet and outlet) àturbulence length scale:2 mmàturbulent intensity:0.04àothers:default
Boundary conditions:
Inlet:stagnation . total pressure:1500pa.Outlet:pressure out pressure:0pa.
other parameters keep as initial conditions.

Try to run some iterations using a velocity or mass flow rate at the inlet. It's better if you know one of these values. Then just go back to your pressure-pressure condition.

Ramp the pressure...