I am simulating a chute flow. My geometry is a rectangular box. There is an inlet and outlet and other walls are fixed. In inlet I am giving velocity inlet conditions and at the outlet I am giving pressure outflow conditions and the value for Po is 0.1.
The fluid is non-newtonian type. In this mu(viscosity) is a function of shear rate and pressure and also it depends on square root of pressure term.
When i try to simulate it gives an error saying it cannot calculate the non-integral power of a negative number. So, it must be because of the square root of pressure we were talking about.
I want to know why the pressure is getting negative
or is there any way to give the command like,
mu= max(2, expression)
where expression is that function of shear rate and pressure
OR
will it get the same result as it cannot calculate the square root of a negative number.
The fluid is non-newtonian type. In this mu(viscosity) is a function of shear rate and pressure and also it depends on square root of pressure term.
When i try to simulate it gives an error saying it cannot calculate the non-integral power of a negative number. So, it must be because of the square root of pressure we were talking about.
I want to know why the pressure is getting negative
or is there any way to give the command like,
mu= max(2, expression)
where expression is that function of shear rate and pressure
OR
will it get the same result as it cannot calculate the square root of a negative number.