Below are heat flux related documents and links that you may find helpful.
Online heat flux conversion calculator (Courtesy Cleave Books)
From Sensors Magazine: Heat Flux: Part 1 - Theory & Part 2 - Application
Material Properties Database (Courtesy Matweb)
Selected references on heat flux (in chronological order):
“Highly sensitive measurements of the energy transferred during plasma sputter deposition of metals”, L. Bedra, A. L. Thomann, N. Semmar, R. Dussart and J. Mathias, Journal of Applied Physics D: Applied Physics, vol. 43, 2010
“Direct measurements of the energy flux due to chemical reactions at the surface of a silicon sample interacting with a SF6 plasma”, R. Dussart, A. L. Thomann, L. E. Pichon, L. Bedra, N. Semmar, P. Lefaucheux,J. Mathias, and Y. Tessier, Applied Physics Letters vol. 93, 131502, 2008
“Diagnostic system for plasma/surface energy transfer characterization”,A.-L. Thomann, N. Semmar, R. Dussart, and J. Mathias, V. Lang, Review of Scientific Instruments, vol. 77, 033501, 2006
“Systematic error in the measurement of very high solar irradiance”, J. Ballestrin, S. Ulmer, A. Morales, A. Barnes, L.W. Langley, M. Rodriguez, Solar Energy Materials & Solar Cells, vol. 80, pp. 375-381, 2003
"Application of Heat Flux Sensors to Detect Liquid Fuel Films within the Cylinder of Firing SI Engine", Ioannou, Marios and Nightingale, J.E., SAE Paper 2000-01-2841
"A Comparison of Radiation Versus Convection Calibration of Thin-Film Heat Flux Gauges," Smith, D. E., Bubb, J. V., Popp, O., Diller, T. E., and Hevey, S. J., in Proceedings of the ASME Heat Transfer Division -- 1999, HTD-vol. 364-4, ASME, NY, 1999, pp. 79-84.
"Steady-state Thermal Flows in an Air-cooled Four Stroke SI Engine", Boyce, Brian P., Martin, Jay K., and Tillock, Brad R., SAE Paper No. 1999-01-0282
"Effects of Ignition Timing and Air-fuel Ratio on In-cylinder Heat Flux and Temperatures in a Four-stroke, Air-cooled, Homogeneous Charge Engine", Boyce, Brian P., Martin, Jay K., Poehlman, Art, and Shears, Doug, SAE Paper No. 1999-284
"Turbulence Structure of Heat Transfer Through a Three-Dimensional Boundary Layer" Journal of Thermophysics and Heat Transfer, vol. 12, Number 2, April-June 1998, pp.248-255, Lewis, D.J., Simpson, R.L., Diller, T.E.
"New High Sensitivity, Low Thermal Resistance Surface Mounted Heat Flux Transducer", ISA-1996, 0227-7576/96, pp. 235-249, Terrel, J.P., Vatell Corporation
"Development of a Noninvasive Blood Perfusion", Advances in Heat and Mass Transfer in Biotechnology-1996 , ASME, pp. 67-73, O'Reilly, T.B., Gonzales, T.L, Diller, T.E.
Measurements with a Heat Flux Microsensor Deposited on a Transonic Turbine Blade", CH34827-95, 1995 IEEE, pp. 1-7, Johnson, L.P., Diller, T.E.
"High-Frequency Heat Flux Sensor Calibration and Modeling", Journal of Fluids Engineering, December 1995, vol. 117, pp. 659-664, Holmberg, D.G., Diller, T.E.
"Time-Resolved Surface Heat Flux Measurements in the Wing/Body Junction Vortex", Journal of Thermophysics and Heat Transfer, 1994, vol. 8, Number 4, pp.656-663, Lewis, D.J., Simpson, R.L., Diller, T.E.
"Microsensors for High Heat Flux Measurements", Journal of Thermophisics and Heat Transfer, Vol. 7, Number 3, July-September 1993, Hager, J.M., Langley, L.W., Onishi, S., Diller, T.E.
"Unsteady Surface Heat Flux and Temperature Measurements", ASME, 93-HT-33, pp.1-9, Baker, K.I., Diller, T.E.
"Blood Perfusion Estimation from Noninvasive Heat Flux Measurements", HTD Vol. 268 - Advances in Bioheat Transfer 1993, ASME, pp. 53-60, Fouquet, Y., Hager, J.M., Terrel, J.P., Diller, T.E.
"Advances in Heat Flux Measurements", Advances in Heat Transfer, published by Academic Press, 1993, pp. 279-367, Diller, T.E.
"Heat Flux Microsensor Measurements and Calibrations", NASA Conference Publication 3161, The 1992 NASA Langley Measurement Technology Conference, pp.69-80, Terrel, J.P., Hager, J.M., Onishi, S., Diller, T.E.
"Simultaneous Measurements of Time-Resolved Surface Heat Flux and Freestream Turbulence at a Stagnation Point", Heat Transfer 1990, vol. 2, pp.375-380, Edited by Hetsroni, , G., Hemisphere Publishing, Simmons, S.G., Hager, J.M., Diller, T.E.
"Heat Flux Microsensors for Biological Measurements", Bioheat Transfer: Applications in Hyperthermia; Emerging Horizons in Instrumentation and Modeling, ASME, NY, 1989, pp. 115-119, Diller, T.E.
“Standard Guide for Heated System Surface Conditions That Produce Contact Burn Injuries,” ASTM Standard C 1055-86, 1986.
“Method and Rating System for Evaluation of Thermal Protection,” Stoll, Alice M., and Maria Chianta. Aerospace Medicine, Nov. 1969, p. 1232-1238.
"Approximations in Transient Surface Heating", Australian Journal of Scientific Research A, vol. 5, 1952, pp.1-9, Jaeger, J.C.