Core body for transfer apparatus

A method comprising:

• additively manufacturing a core body by sequentially depositing layers of material at least partially on top each other in a build direction to form a structure, the structure defined by a plurality of unit cells that are interconnected and arranged in a repeating pattern, the unit cells having a respective cell body with a curved sidewall that defines a main cavity of the cell body, the unit cells having tubular extensions that physically connect the cell bodies of different unit cells, the tubular extensions defining flow channels, the curved sidewalls defining orifices to fluidly connect the main cavities of the different unit cells to the flow channels, the unit cells configured to permit flow of a first fluid through the structure within the main cavities of the cell bodies and the flow channels of the tubular extensions without the first fluid mixing with a second fluid that is disposed in spaces between the unit cells,
• the core body additively manufactured to define a first set of orifices and a second set of orifices through the curved sidewall of a first unit cell, the first set of orifices fluidly connecting to a first subset of the unit cells via a first group of the tubular extensions, the second set of orifices fluidly connecting to a second subset of the unit cells via a second group of the tubular extensions,
• the core body additively manufactured to form the main cavity of the first unit cell having a dimension, along a portion of the curved sidewall between the first set of orifices and the second set of orifices, that is greater than cross-sectional dimensions of the orifices in the first and second sets of orifices, and
• wherein the core body is additively manufactured such that the curved sidewall of the cell body of at least some of the unit cells includes a cone that projects toward a center point of the respective cell body.

A core body comprising:

• a structure defined by a plurality of unit cells that are interconnected and arranged in a repeating pattern, the unit cells having a respective cell body with a curved sidewall that defines a main cavity of the cell body, the unit cells having tubular extensions that physically connect the cell bodies of different unit cells, the tubular extensions define flow channels, the curved sidewalls defining orifices to fluidly connect the main cavities of the different unit cells to the flow channels, the unit cells configured to permit flow of a first fluid through the structure within the main cavities of the cell bodies and the flow channels of the tubular extensions without the first fluid mixing with a second fluid that is disposed in spaces between the unit cells,
• the curved sidewall of a first unit cell of the unit cells defining a first set of orifices that fluidly connect, via a first group of the tubular extensions, to a first subset of the unit cells, and defines a second set of orifices that fluidly connect, via a second group of the tubular extensions, to a second subset of the unit cells,
• a collective volume of the main cavities of the cell bodies and the flow channels of the tubular extensions in the core body is greater than a collective volume of the spaces between the unit cells, and
• wherein the curved sidewall of the cell body of at least some of the unit cells includes a cone that projects toward a center point of the respective cell body.