In the Flow Simulation analysis tree right-click the Printed Circuit Boards item and select Insert Printed Circuit Board. Click Printed Circuit Board on the Flow Simulation Features toolbar or Flow Simulation > Insert > Printed Circuit Board.The selected body should be a thin plate (one of the body’s dimensions is substantially smaller than two others) with two parallel surfaces and can be arbitrary aligned, not necessarily along global coordinate system axes. The direction is determined automatically from the body geometry. The body is considered as a solid with Axisymmetrical/Biaxial type of anisotropic thermal conductivity. You may assign one of PCBs stored in the Engineering Database to a solid body. the volume fraction of conductor material in the layer, and the Layer Thickness (tCi). Also for each conducting layer you must specify the Percentage Cover (Ai), i.e. The Layer Definition type implies that you must specify the PCB total thickness (t) and the Number of conducting layers (nC). With the Board Mass type, the PCB total mass (M) and PCB total volume (V) are used to calculate the fraction of conductor material (A) in it. the volume fraction of conductor material in the PCB. The Conductor Volume Fraction type requires the specification of Percentage conductor in PCB volume (A), i.e. In the latter case, you must specify density (r), specific heat (C), and thermal conductivity (K) for both dielectric (denoted by ‘D’ index) and conductor (denoted by ‘C’ index) materials of the PCB, and describe its internal structure in one of the provided types: Conductor Volume Fraction You can either select a pre-defined PCB from the Engineering Database, or create a user-defined one by specifying its parameters. its effective density, specific heat, and components of thermal conductivity, are calculated on the basis of the PCB structure. The integral characteristics of a PCB, i.e. Printed Circuit Boards (PCBs) are concerned as a special case of solid material having anisotropic thermal conductivity.