Ready for Transfer

Sandia’s Right-Size Dimple Evaluator

Dept. of Energy

Laboratory: Sandia National Laboratories

Technology: Right-Size Dimple Evaluator

Opportunity: This Sandia technology is currently at a technology readiness level 5, with key elements having been demonstrated successfully in relevant environments.

Details: Sandia’s Right-Size Dimple Evaluator uses a unique set of independent turbulence equations, with input based on the system’s specific characteristics. The software can also import fluid properties from the REFPROP NIST database. The software uses the input to calculate an optimal dimpled pattern for the intended application, thereby eliminating guesswork or design by trial and error. The software ensures that the dimple dimensions enable unimpeded flow through the dimple’s concave cavity. This software will enable a wider range of applications to apply dimple modifications to enhance performance.


  • Optimal dimple spacing and size for reduced resistance to flow
  • Increased heat transfer rate at surfaces for higher thermal efficiency
  • Script runs on Matlab but can be easily programmed in C++ and Fortran
  • Designed to run on a PC
  • Can import fluid density and viscosity values from REFPROP NIST


  • Any system with turbulent flow
  • Microfluidics
  • Turbines
  • Heat exchangers
  • Ships
  • Applicable in the aerospace, vehicle design, solar, wind, and nuclear energy industries

Contact: For more information on this or other Sandia tehnologies, contact

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