When you create formula-driven lattice, you can offset the lattice wall and vary the offset. Varying the lattice wall offset is useful when you want to create structures that direct flow, like baffles in a heat exchanger. The offset can be greater near references that must be sealed in order to separate different spaces.

The following lattice parameters on the Density tab are recommended when you use a wall offset to create baffles:

In this example, complementary bodies are used:

Single cell of formula-driven lattice:

Two complementary zones are created by the lattice, one on each side of the lattice:

Lattice dividing the space into complementary zones:

In this example, baffles are used to direct flow through two intertwined but separate volumes:

In the first image, a cross section of two intersecting pipes shows lattice that is uniform throughout the part. Fluids from both compartments can flow through all four openings.

In the second image, by creating varying offsets of the lattice walls, the flow is directed so fluid from the green compartment flows only through two openings, and fluid from the red compartment flows through the other two openings.

To create the baffles, a target wall offset with a positive value was used for one set of inlet and outlet openings, and a target wall offset with a negative value was used for the other set.

Watch a video that shows use cases for variable wall offset in formula-driven lattices.