Ajimon Thomas

Updated 2017/10/04

Ph.D. Student (Graduate Research Assistant)
Department of Civil, Construction and Environmental Engineering
North Carolina State University
Mann Hall, Room 428
2501 Stinson Drive
Raleigh NC 27607
athomas9@ncsu.edu

I am a fifth year Ph.D. student in Coastal Engineering at NC State University. My research interests include Numerical Modelling of Water Systems, Ocean and Coastal Engineering, Offshore Structures and Dynamic Response of Structures. During my masters at National Institute of Technology, Calicut, my thesis dealt with finding the Response of Semi-Submersibles under Multi-Directional seas. The semi-submersible was modeled as a rigid body with six degrees of freedom and the multi-component mooring lines as nonlinear springs at its fair-lead point. Modified Morison equation was then used to find the wave forces and the dynamic equilibrium equation was solved in time-domain using an iterative procedure by Newmark-Beta method.

During my initial years of research at NC State, I was involved in the NC Sea Grant project “Strengthening the Hurricane Wave and Surge Forecast Guidance provided to Coastal Communities in North Carolina.” The aim of this project was to improve the accuracy of storm surge prediction for the North Carolina region. This was done by refining the mesh used for running the coupled ADCIRC+SWAN model at selected regions based on the errors in mass conservation. I was also a part of the DHS project “Improving the Efficiency of Wave and Surge Models via Adaptive Mesh Resolution, that dealt with hindcasts of winds and surge during Hurricane Matthew (2016). Here, we looked at the influence of storm timing and forward speed on flooding during a hurricane. The contribution of non-linear interaction between tides and surge to the total water levels were also quantified.

My current research deals with implementing a multi-resolution approach to reduce the computational workload of storm surge models, and is also being funded as part of the above DHS project. Rather than using a single high-resolution mesh throughout the simulation, different meshes of varying resolution will be used depending on where the storm is at that point in time. A coarse-resolution mesh without extensive coastal detail can be used when the storm is far away. As the storm approaches the region of interest, the results can be mapped on to a high-resolution mesh. The simulation will then continue on the fine mesh, thus providing high-accurate results for that coastline. This technique will thus enable storm surge forecasting with both ensemble calculation and high-resolution capabilities.

Aside from research, I enjoy being physically active whether it be playing soccer or going for hikes and runs. I also love watching sports, hanging out with my friends, playing counter-strike, pencil sketching, and visiting new places.

 

Experience

North Carolina State University

Mar Baselios College of Engineering and Technology (MBCET)

  • Department of Civil Engineering
    • Assistant Professor from June 2012 to June 2014

 

Education

M. Tech, Offshore Structures

B. Tech, Civil Engineering

  • College of Engineering, Trivandrum, 2009
  • Project: A study on the Torsional Behavior of Asymmetric Buildings under Seismic Excitation, with Dr. Jiji Anna Varughese
  • Distinction

 

Publications

Journal Articles

  1. A Thomas, JC Dietrich, TG Asher, M Bell, BO Blanton, JH Copeland, AT Cox, CN Dawson, JG Fleming, RA Luettich (2019). “Influence of Storm Timing and Forward Speed on Tide-Surge Interactions during Hurricane Matthew.” Ocean Modelling, 137, 1-19, DOI: 10.1016/j.ocemod.2019.03.004.

  2. AA Vahab, A Thomas (2014). ″Effect of Steel Fibre Reinforced High Performance Concrete Exterior Beam Column Joint Subjected to Cyclic Loading.″ International Journal of Engineering Research & Technology, Vol.3, Issue 9, pp 1409-1414, e-ISSN: 2278-0181

Conference Proceedings

  1. A Krishnan, A Thomas, T George (2014). “Feasibility Study on Implementing Shock Response Spectrum in a Finite Element Software.” Proceedings of the International Conference on Energy, Environment, Materials and Safety, held at CUSAT on December 10-12, 2014.

  2. S Jayasree, A Raj, A Thomas, AA Vahab (2014). “Effect of Silica Fume on the Properties of High Performance Concrete.” Proceedings of the National Conference on Recent Engineering Advances and Trends (NCREAT), pp.235-242, held at Pankajakasturi College of Engineering on January 2014.

  3. S Jayasree, A Raj, A Thomas (2014). “Strength and Durability of Concrete Containing Recycled Concrete Aggregate.” Proceedings of the National Conference on Recent Engineering Advances and Trends (NCREAT), pp.2-7, held at Pankajakasturi College of Engineering on January 2014.

  4. S Jayasree, A Raj, A Thomas (2013). “Strength and Durability of Concrete Containing Recycled Concrete Aggregate.” Proceedings of the National Seminar on Advances in Structural Engineering (NASE), held at Mar Baselios College of Engineering and Technology on December 2013.

  5. S Jayasree, A Raj, A Thomas, AA Vahab (2013). “Effect of Silica Fume on the Properties of High Performance Concrete.” Proceedings of the National Seminar on Advances in Structural Engineering (NASE), held at Mar Baselios College of Engineering and Technology on December 2013.

  6. A Krishnan, A Thomas (2013). “Post Buckling Analysis of Simply supported Composite Plates.” Proceedings of the National Seminar on Advances in Structural Engineering (NASE), held at Mar Baselios College of Engineering and Technology on December 2013.

 

Presentations

List Indicators

* Presenter

Conference Presentations

  1. A Thomas*, JC Dietrich, TG Asher, M Bell, BO Blanton, JH Copeland, AT Cox, CN Dawson, JG Fleming, M Loveland, RA Luettich. “Using a Multi-Resolution Approach to Improve the Accuracy and Efficiency of Flooding Predictions.” ADCIRC Users Group Meeting, Vicksburg, Mississippi, 20-21 May 2019.

  2. A Thomas*, JC Dietrich, TG Asher, M Bell, BO Blanton, JH Copeland, AT Cox, CN Dawson, JG Fleming, M Loveland, RA Luettich. “Using a Multi-Resolution Approach to Improve the Accuracy and Efficiency of Flooding Predictions.” 20th International Conference on Finite Elements in Flow Problems, Chicago, Illinois, 31 March-03 April 2019.

  3. A Thomas*, JC Dietrich, TG Asher, BO Blanton, AT Cox, CN Dawson, JG Fleming, RA Luettich. “High-Resolution Modeling of Surge during Hurricane Matthew.” Estuarine and Coastal Modeling Conference, Seattle, Washington, 25-27 June 2018.

  4. JC Dietrich*, R Cyriac, A Thomas, A Gharagozlou, N Tull. “How Can We Speed Up Our Coastal Flooding Models?” NSF Workshop on the Future of Coastal and Estuarine Modeling, Raleigh, North Carolina, 20 June 2018.

  5. A Thomas*, JC Dietrich, JG Fleming, BO Blanton, TG Asher, RA Luettich. “High-Resolution Modeling of Surge during Hurricane Matthew.” ADCIRC Users Group Meeting, College Park, Maryland, 13 April 2018.

  6. A Thomas*, JC Dietrich, RA Luettich, JG Fleming, BO Blanton, TG Asher, SC Hagen, MV Bilskie, P Bacopoulos. “Hindcasts of Winds and Surge during Hurricane Matthew (2016): Balancing Large-Domain Coverage and Localized Accuracy.” ADCIRC Users Group Meeting, Norwood, Massachusetts, 04-05 May 2017.

  7. JC Dietrich*, A Thomas, A Gharagozlou, MF Overton, RA Luettich, JG Fleming, BO Blanton, C Kaiser. “Predictive Modeling for Storm Surge and Flooding Risks in Coastal North Carolina.” North Carolina’s Coastal Conference, Raleigh, North Carolina, 4-5 April 2017.

  8. JC Dietrich*, A Gharagozlou, MF Overton, A Thomas, RA Luettich Jr, JG Fleming, BO Blanton, C Kaiser. “Interactions between Waves, Flooding, and Beach Morphology during Storm Events.” North Carolina Beach, Inlet, & Waterway Association Annual Conference, Wrightsville Beach, North Carolina, 14-15 November 2016.

  9. JC Dietrich*, CN Dawson, A Thomas. “Improved Efficiency for Wave and Surge Models via Adaptive Domain Decomposition.” Computational Methods for Water Resources, Toronto, Ontario, Canada, 20-24 June 2016.

  10. A Thomas*, JC Dietrich, JG Fleming, BO Blanton, RA Luettich Jr. “Optimizing the Placement of Unstructured Mesh Resolution for ADCIRC in Coastal Regions.” ADCIRC Users Group Meeting, US Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory, Vicksburg, Mississippi, 05-06 May 2016.

Seminars

  1. JC Dietrich*, A Thomas, A Gharagozlou, JL Woodruff, A Poisson, CA Rucker, BO Blanton, JG Fleming, RA Luettich, KJ Roberts, JJ Westerink. “Forecasting and Mapping of Coastal Flooding during Hurricanes.” Numerical Analysis Seminar Series, Department of Mathematics, North Carolina State University, Raleigh, North Carolina, 19 March 2019.

  2. JC Dietrich*, R Cyriac, A Thomas, A Gharagozlou, N Tull, JG Fleming, BO Blanton, C Kaiser, RA Luettich. “Predictive Modeling for Storm Surge and Flooding Risks in North Carolina” Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina, 14 September 2017.

  3. JC Dietrich*, A Thomas, A Gharagozlou, N Tull, MF Overton, RA Luettich, JG Fleming, BO Blanton, C Kaiser. “Predictive Modeling for Storm Surge and Flooding Risks in North Carolina.” NWS Mid-Atlantic and Southeast Subregional Workshop, Raleigh, North Carolina, 28 April 2017.

  4. JC Dietrich*, A Thomas, A Gharagozlou, MF Overton, RA Luettich, JG Fleming, BO Blanton, C Kaiser. “Hurricane Wave and Storm Surge Modeling: Recent Developments and Forecasting during Hurricane Matthew.” Duke University Marine Lab, Beaufort, North Carolina, 12 April 2017.

  5. JC Dietrich*, A Thomas, A Gharagozlou, MF Overton, RA Luettich, JG Fleming, BO Blanton, C Kaiser. “Hurricane Wave and Storm Surge Forecasting for the North Carolina Coast.” College of Science, Technology, Engineering and Mathematics, Johnson C. Smith University, Charlotte, North Carolina, 31 March 2017.

  6. JC Dietrich*, A Thomas, A Behnia, CN Dawson. “Hurricane Wave and Storm Surge Forecasting for the North Carolina Coast.” Department of Civil and Environmental Engineering, Jackson State University, Jackson, Mississippi, 04 May 2016.

Posters

  1. A Thomas*, JC Dietrich, JG Fleming, BO Blanton, T Asher, RA Luettich Jr. “High-Resolution Modelling of Surge during Hurricane Matthew (2016).”Graduate Student Research Symposium, North Carolina State University, 21 March 2018.

  2. A Thomas*, JC Dietrich, JG Fleming, BO Blanton, T Asher, RA Luettich Jr. “High-Resolution Modelling of Surge during Hurricane Matthew (2016).”Environmental, Water Resources and Coastal Engineering Graduate Research Symposium, North Carolina State University, 2 March 2018.

    • Honorable Mention

  3. A Thomas*, JC Dietrich, JG Fleming, BO Blanton, RA Luettich Jr. “Optimizing the Design of Unstructured Meshes Describing North Carolina Coastal Regions to Improve Accuracy of Flood Predictions.” Computing & Systems Research Symposium, North Carolina State University, 22 April 2016.

  4. A Thomas*, JC Dietrich, JG Fleming, BO Blanton, RA Luettich Jr. “Optimizing the Design of Unstructured Meshes Describing North Carolina Coastal Regions to Improve Accuracy of Flood Predictions.” Environmental, Water Resources and Coastal Engineering Graduate Research Symposium, North Carolina State University, 04 March 2016.

 

Technical Skills

Ocean Models

  • ADCIRC, SWAN

Geographic Information Systems

  • ArcGIS, Surface-water Modeling System (SMS)

Structural Analysis, Design and Planning Softwares

  • AutoCAD, STAAD, SAP, Primavera

Programming Languages

  • Python, MATLAB, Fortran

 

Honors and Awards

  • Travel award from the International Association for Computational Mechanics (IACM) for attending the 2019 Finite Elements in Fluids (FEF) Conference

 

Positions of Responsibility

  • Reviewer for Journal of Geophysical Research – Oceans (1)
  • Treasurer, COPRI at NC State (2016-2017)
  • Coordinator for the 2 weeks ISTE Workshop on Engineering Mechanics conducted by IIT Bombay (2013)
  • Program Convener for the National Seminar on Advances in Structural Engineering (2013)
  • Department Coordinator, Civil Engineering Department at Mar Baselios College of Engineering and Technology (2012-2014)
  • Member of Organizing Committee for the International Conference on Green Technologies (2012)
  • Member of Organizing Committee for International Conference on Advances in Materials and Techniques Infrastructure Development (2011)
  • M Tech. Sports Representative, NIT Calicut (2011-2012)

 

Professional Organizations

 

Teaching

Instructor (9)

Course Year Students
Structual Optimization 2014 18
Structural Engineering and Computational Lab 2014 18
2012 17
Structural Analysis-I 2013-14 61
Experimental Methods and Instrumentation 2013-14 18
Strength and Behavior of Structural Materials 2013 16
Mechanics of Structures 2013 61
Engineering Mechanics 2012-13 61
Experimental Stress Analysis 2012 17

 

Teaching Assistant (1)

Course Instructor Location Semester
CE 382 Fluid Mechanics JC Dietrich NC State Fall 2014