Hydropower (Water Energy) Expert Witnesses

Mechanical Solutions, Inc. (MSI) performs litigation support through its extensive engineering capabilities, and when required, through expert testimony. MSI uses advanced finite element analysis (FEA), rotor dynamics, and torsional analysis tools, and uses computational fluid dynamics (CFD) to analyze 3-D steady or unsteady fluid flows and heat transfer, enabled by its 230 high speed processor supercomputers.

MSI also uses top-of-the-line testing equipment, including multichannel FFT analyzers (up to 200 simultaneous channels) to accurately read the outputs of various vibration, stress/strain, and pressure sensors, as a function of both time and frequency. As a unique additional test capability, MSI uses motion magnification video cameras to amplify and display scene vibration by 1000x. MSI uses calibrated exciters while equipment remains running, to locate structural, rotor, and acoustic natural frequency resonances as they exist at any particular operating point, without interfering with machinery operation. In addition, MSI performs stress, acoustic, dynamic pressure pulsation, electric current spectrum, and aero/hydraulic performance testing.

Areas of Expertise:

Solving Challenges with Rotating Machinery Vibrations

William D. Marscher, PE, performs expert witnessing and engineering work in the field of Fluid Systems and their Rotating and Reciprocating Machinery, particularly large turbines, generators, compressors, and pumps. His typical work responsibilities include design, analysis, and testing of all types of plant machinery, as well as other types of fluid and mechanical systems. Mr. Marscher has background in various types of turbines (including hydraulic, steam, and gas), as well as various types of pumps, including centrifugal as well as positive displacement (e.g. reciprocating, gear, rotary, and screw).

Mr. Marscher's expert witnessing experience includes 27 cases over the course of his 50+ year career, for which he provided detailed engineering reports in support of the case. This legal support experience includes witnessing in front of tribunals four times, and testifying in Federal Court in four cases. He also has performed depositions 11 times. 

For the past 45 years, Mr. Marscher has been a voting member of the ASTM Fatigue Standards Committee E9, as well as the ASTM Wear & Erosion Standards Committee G2. He is also the past Board of Directors Chairman for the Machinery Failure Prevention Technology Society (MFPT), and has been active in the Vibration Institute. Mr. Marscher is a 23-year member of the Texas A&M Turbine-Pump Users Symposium Advisory Committee (essentially the Board of Directors for the Symposium). For ASME, he was Chair of the Predictive Maintenance committee and was Organizing and Presiding Chair of the 1993 RoCon Rotating Machinery Conference and the 1995 Tribology Conference.

Dr. Edward Bennett is MSI’s VP of Fluids Engineering.  Dr. Bennett graduated from the Naval Academy, following which he was a navy test pilot.  Later he received his PhD in Fluid Dynamics from Johns Hopkins University. Dr. Bennett has been a well-known leader in Fluid Dynamics and the Aero/hydrodynamic Design of Turbomachinery for the past thirty plus years.  

In 1995, Dr. Bennett founded ASC Turbo, a design house that combined the CFD software from Advanced Scientific Computing and specialized turbomachinery design software.  During this time, he worked on the development of BladeGen, a 3-dimensional turbomachinery blade geometry kernel, and also performed a key role design work that included the starter turbine and vapor cycle compressor for the F-22 Raptor fighter, several biomechanical cardiac pumps, a LOX rocket turbopump, as well as numerous more “conventional” turbomachinery designs. After this, he served as Director of Turbopumps for Gencorp Aerojet, and authored the hydraulic design methodology that is still in use by that organization.

At MSI, Dr. Bennett oversees fluid dynamic design and analysis of pumps, compressors, and turbines, including various sizes of hydroturbine generators.  This work includes detailed computational fluid dynamic (CFD) analysis, as well as test rig design, and flow loop/ wind tunnel validation testing.  Recently, he has supported major law firms with expert report writing and detailed two-phase flow unsteady CFD analysis of 100MW and 400 MW hydroturbines in the US and Canada.

Paul A. Boyadjis is Director of Rotating Machinery Analysis for MSI.  Mr. Boyadjis has a BS and MS in Mechanical Engineering from Lehigh University where he graduated summa cum laude.  He has over 35 years of diverse experience in the analysis and Design of Centrifugal Pumps and Pumping Systems, as well as Centrifugal Compressors. His specialty includes complex 3D solids modeling for stress and vibration analysis using advanced finite element techniques, and he has worked as a lead analytical engineer for major manufacturers. 

Mr. Boyadjis is also an expert at rotordynamics, and field testing. He has enjoyed participating as a Hydraulic Institute Standards Partner for over a decade, and became vice chair of its Vibration Committee, and was named Standards Partner of the Year in 2021.  Paul played a key role in various standards. 

Years ago, Mr. Mr. Boyadjis developed the solids modeling and advanced finite element analysis capabilities at the Government Marine Business unit of Ingersoll-Rand, and wrote many of the structural and vibration analysis procedures for that division. As mergers took place, he then transferred these analytical capabilities to the Research and Development group of Ingersoll-Dresser Pump and later Flowserve.

While with MSI, Mr. Boyadjis has conducted detailed 3D finite element analysis of failed casings and impellers, performing forensic investigations, and when necessary, providing successful design enhancements for industrial and municipal customers. He has directed or participated in many testing and troubleshooting projects, particularly for water and wastewater pumping systems.

View MSI's Consulting Profile.

Due Diligence Professional Services, Inc. (DDPSI )is a Construction Consulting and Expert Witness Firm that Specializes in Supporting Litigation and Representing Clients for Renewable Energy, Power, Heavy Civil, Underground Utilities, Building and other related Construction Specialty Projects. They are a diverse team with construction claims and project management expertise who value the importance of relationships and continue to distinguish themselves by showing clients that Experience + Talent + Strategy = Results.

Litigation Support - DDPS understands the complexities of dispute resolution and work extensively with attorneys to identify documents, prepare computerized document databases, establish document shared files, support witness statements, and prepare expert reports. Their construction and engineering litigation expert witnesses participate hands-on in all projects. They develop the methodology of analyses, analyze the relevant documentation, and develop support for opinions.

• Renewable Energy - Utility Scale Wind, Utility Scale PV Solar, Utility Scale Concentrated Solar Power, Biomass and Battery Storage
• Heavy Civil - Earthwork, Roads, Bridges Highways and Airports
• Power - Transmission, Distribution and Substation / Switching Yards
• Underground Utilities - Water, Reclaimed Water, Storm Drainage, Sanitary Sewer/Lift Stations, and Force Main
• Buildings - Commercial, Institutional, Industrial, and Heavy Civil
• Construction Specialties - Dewatering, Directional Drilling/Jack and Bore, Low Pressure Sewer, Fiber Optic Systems, Reinforced Earth Wall, Sound Barrier Wall, Telecommunication Infrastructure, Transformer – RCA of failures and Transmission Line Pole Remediation

Nicholas Fiduccia is President and Co-Founder of Due Diligence Professional Services, Inc. a Florida based expert witness service, construction claims specialist and project management consulting firm that focuses its practice on law firms, owners, engineering, construction firms, and contractors performing renewable energy, power, heavy civil, underground utilities, building and other related construction specialties.

Mr. Fiduccia has over 30 years of U.S. and Canadian construction experience involving construction contract disputes analysis and resolution, arbitration/litigation support and expert testimony, project management, engineering/construction management, cost and schedule control, and value-engineering.

Before co-forming Due Diligence Professional Services, Inc, Mr. Fiduccia had corporate-wide responsibility for technical management and oversight for the preparation and resolution of construction claims for 11 years for a utility-scale renewable energy and heavy civil infrastructure contractor, plus over 19 years of hands-on experience to ensure that profit, cost, schedule, scope, quality, and safety objectives were achieved for renewable energy, power, heavy civil, underground utilities, building and other related construction specialty projects.

Ron Ritter, Vice President and Co-Founder of Due Diligence Professional Services, Inc. has been responsible for on-site project management for Wind, Solar, Battery Energy Storage System (BESS) Projects, Heavy Civil Projects, and Underground Utility Projects over the last 25 years.

Mr. Ritter’s expertise in a full array of self-perform and key subcontractor oversight has allowed him to execute multiple EPC contracts successfully and safely. 

Before co-forming Due Diligence Professional Services, Inc, Mr. Ritter successfully built a career in the construction industry that consisted of 45 years of hands-on, field experience. Twenty (20) years of that field experience has been spent building and supervising the construction of renewable energy facilities. Seventeen (17) years of his construction career have been spent as the senior field representative, directly responsible for the safe, timely, profitable and quality construction of 15 wind farms in the USA totaling 2,465 megawatts.  Mr. Ritter has also worked on and supported the construction of wind farms and solar farms in Canada.  

View Due Diligence Professional Services, Inc.'s Consulting Profile.