Flat micro heat pipes utilizing arrays of parallel metal wires sandwiched between two thin metal sheets were conceptualized, modeled, and analyzed. An experimental facility was fabricated and experimental tests were conductedtoverifytheconcept,aswellastovalidatetheproposedmodel.Themodeling resultswerethencompared with the results of the experimental investigation. In the analytical portion of the investigation, a one-dimensional steady-stateanalyticalmodel,whichincorporatedtheeffectsoftheliquid ‐vaporphaseinteractionandthevariation inthecross-sectionalarea,wasdevelopedtopredicttheheattransferperformanceandoptimumdesignparameters. The mass distribution, optimum charge, and maximum heat transport capacity were all obtained by solving the one-dimensionalgoverningequationsnumerically.Theresultsindicatedthatthemaximumheattransportcapacity increased with increases in wire diameter and that the overall value was proportional to the square of the wire diameter. The wire diameter was also found to affect the optimum operating temperature within the overall operating temperature range of the working e uid. In addition to determining the effect of the wire diameter, the numerical model provided a mechanism by which the effects of the wire spacing and evaporator heat e ux could be determined. The results indicated that the maximum heat transport capacity increased with increases in the wire spacing and that there exists an optimal cone guration that yields the maximum heat transport capacity. The optimum charge volume was shown to decrease rapidly with increases in the evaporator heat e ux. The results of the analytical model were compared with experimental results available in the literature and indicated good agreement between the predicted and measured maximum heat transport capacity for these types of wire-bonded e at heat pipes. Nomenclature Ac;l = liquid-phase cross-sectional area, m 2 Ac;v = vapor-phase cross-sectional area, m 2 Ai = liquid‐vapor interface cross-sectional area, m 2 Al;w = liquid‐wall contact area, m 2 Av;w = vapor‐wall contact area, m 2 Cp = specie c heat capacity, J/kg K Dh;l = hydraulic diameter of liquid, m Dh;v = hydraulic diameter of vapor, m dw = wire diameter, m fl = liquid friction factor fv = vapor friction factor g = gravity acceleration, m/s 2 H = height of the triangle, m h fg = latent heat of vaporization, J/kg kl = thermal conductivity of liquid, W/K ¢m kv = thermal conductivity of vapor, W/K ¢m Lc = length of condenser section, m Le = length of evaporator section, m Lt = total length of the micro heat pipe, m M = mass, kg ml = liquid mass e ow rate, kg/s mv = vapor mass e ow rate, kg/s P = pressure, Pa Pc = capillary pressure, Pa Pl = liquid pressure, Pa Pv = vapor pressure, Pa