Additive manufacturing of a vugular loss zone simulating test device

A loss circulation material (LCM) testing apparatus, comprising:

• A LCM testing cell, comprising:
• An inlet for introducing a LCM testing fluid into the LCM test cell, where the LCM testing fluid comprises a slurry of LCM material and a wellbore drilling fluid;
• An outlet for passing the LCM testing fluid from the LCM test cell, where a fluid flow pathway is defined through the LCM testing cell between the inlet and the outlet;
• A disk member that is removable and that is positioned in the fluid flow pathway such that fluid flowing from the inlet to the outlet traverses through a plurality of flow openings in the disk member, where the disk member comprises a disk base and a plurality of downstream-directed extensions, and where the disk base and the plurality of downstream-directed extensions define the plurality of flow openings.