[quarkz]

Hi,

I wanted to create a custom inlet U BC which changes with time and I'm trying to use the codedFixedValue method.

I come across 2 ways to modifly the inlet U:

1.

time = this->db().time().value();
const fvPatch& boundaryPatch = patch(); 
vectorField& field = *this;

forAll(boundaryPatch, faceI) {
					
	field[faceI] =  vector( starting_incoming_vel*time, 0,0);
			   
	}

2.

cur_incoming_vel = vector( starting_incoming_vel*time, 0,0);
					
operator==( cur_incoming_vel );

So are they the same? Can I use either mtd?

Thanks

[Tobermory]

It seems that the header file for codedFixedValueFvPatchField.H (https://cpp.openfoam.org/v8/codedFix...8H_source.html) uses operator==() as an example, so I would suggest giving it a try. I guess they included it precisely to make it easier, and avoid you having to use a forAll loop.

[Shibi]

I asked something similar some time ago for ESI version:

see if it helps: Coding a new boundary condition

[quarkz]

Hi Tobermory adn Shibi, thanks for the info!