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Dr. Hollenbach utilizes his aptitude in mechanical engineering to provide technical consulting involving thermal-fluid systems, aeroelasticity, aerodynamics, vibrations, fluid-structure interaction, and turbomachinery. He applies the fundamentals of mechanics, aerospace engineering, physics, and mathematical modeling to investigate performance and failures within thermal and fluid systems. He has performed inspections ranging in size from residential to large-scale industrial facilities and processes, written reports for both domestic litigation and international arbitrations, and conducted both experimental and computational analyses for a variety of projects.

Dr. Hollenbach  is active within the American Society of Mechanical Engineering (ASME), the American Institute of Aeronautics and Astronautics (AIAA), and Tau Beta Pi Engineering Honor Society. He was recognized as an ASME Early Career Leadership Intern Program to Serve Engineering (ECLIPSE) member as well as a Non-Destructive Testing RISE Leadership Development Program member in 2023. He has reviewed technical articles for Turbo Expo, Global Power and Propulsion Society, and the International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines (ISHUAAAT). Dr. Hollenbach's work comprises the following fields:

AVIATION & AEROSPACE SERVICES

Dr. Hollenbach has consulted on large scale aerospace related arbitrations. Previous projects have included assessing composite aircraft coatings, investigating helicopter wreckage, and conducting technical analyses involving combined cycle turbomachinery power plants. He has performed domestic and international inspections in a number of these cases. Dr. Hollenbach draws upon his graduate school work in the field of rotating machinery, where he has published articles at the Turbo Expo Conference and in the Journal of Turbomachinery.

FLUID AND HEAT TRANSFER EQUIPMENT

Dr. Hollenbach has performed technical evaluations on compressor and turbine technologies including fundamental calculations, numerical simulations, and laboratory scale testing. Moreover, he has conducted structural and vibrational analyses to predict and evaluate the failure of turbomachinery blades. He has designed and tested various vibration absorbers, including a sloshing fluid tank for non-linear responses. He uses fundamental thermodynamic principles to evaluate efficiencies of various types of industrial equipment. He applies his knowledge of turbomachinery to renewable energy applications, such as hydro and wind turbines.

CFD AND ADVANCED THERMAL FLUIDS ANALYSIS

Dr. Hollenbach utilizes computational fluid dynamics software to study thermal and fluid systems, including pressurized hydraulic brake cables for vehicle applications. He has also conducted small and large scale analyses. He has previously studied deformable meshes in order to study enforced motion aerodynamics of cylinders and NACA 0012 airfoils. He has also utilized the fundamentals of compressible fluid dynamics to study the performance of a three-stage turbine.

As a Graduate Researcher in the Aeroelasticity Laboratory at Duke University, Dr. Hollenbach utilized a low-speed wind tunnel and high-performance computational fluid dynamics simulations to study unsteady pressures of turbomachinery. Experimentally, he calibrated steady and unsteady pressure sensors and collected lift, drag, moment, and pressure data. He also designed, machined, and constructed experimental rigs including wind oscillation systems and a turbine blade linear cascade. Computationally, Dr. Hollenbach modelled geometry, meshed, and ran large-scale simulations, including steady-state mixing plane as well as transient blade row turbomachinery configurations. Also while at Duke University, he taught machine shop training to undergraduate students and is adept at rapid prototype development both computationally through CAD and physically through 3D printing.