Publications
Showing 17 results for Author: Nithin S. Panicker
May, 2026
ORNL Report
COMPUTATIONAL DESIGN AND DEVELOPMENT OF A VENTURI REACTOR FOR CO2 CAPTURE APPLICATIONS
Oct, 2025
Journal
Multi-Physics Melt Pool Modeling and Process Optimization for Laser Direct Energy Deposition of Nb-Based Refractory C103: Defect Formation, Geometric Precision, and Process Mapping
Recent developments in additive manufacturing (AM) technology have reignited interest in the fabrication of the Nb-based refractory C103 alloy offering solutions to the challenges posed by traditional manufacturing methods. However, the limited numerical and experimental studies on laser direct energy deposition (DED) of C103 have hindered the understanding of the relation…
Aug, 2024
Journal
Novel designs for ejector-based systems for enhanced fluid recovery verified through CFD Simulations
Ejector-based systems are widely used for various industrial purposes, including transporting fluids, trapping particulate matters, and refrigeration. Novel design strategies can aid in the enhancement of key performance parameters such as entrainment ratio (ER) and entrained mass flow rate, resulting in an increase in energy efficiency over conventional designs. This stud…
Dec, 2023
Journal
A Large Eddy Simulation Study of Flow Turbulence, Alumina Transport, and Bath Temperature Evolution in Conventional Aluminum-Smelting Cell Using OpenFOAM
In this study, a Large Eddy Simulation (LES) of the aluminum-smelting process is performed using OpenFOAM. To understand the coupled behavior of heat transfer, mass transfer, and flow of the smelting process, a multi-physics computational fluid dynamics (CFD) model based on the Eulerian–Eulerian multi-fluid approach is adopted. The model accounts for CO2 bubble and magneto…
Dec, 2023
Journal
Computational fluid dynamics investigations of flow, heat transfer, and oxidation in heat recovery steam generator
Modern heat recovery steam generators (HRSGs) operate at elevated temperatures, leading to the formation of oxides inside the tubes of heat exchangers (HXs). This oxide growth reduces the heat recovery efficiency. Moreover, after reaching a certain critical thickness, some oxide scales detach from the tube surface (exfoliation), causing erosion damage to the components dow…
Dec, 2023
ORNL Report
Validation of Thermohydraulic Simulations using RELAP for Critical Dual Purpose Canisters
Simulations using the RELAP5-3D systems analysis code and STAR-CCM+, a high-fidelity CFD code, were performed on a model of a real-scale MPC-32 dual purpose canister undergoing a criticality event. These simulations were performed to provide code-to-code verification of the natural convection capabilities in RELAP5. The STAR-CCM+ simulations revealed various natural convec…
Nov, 2023
ORNL Report
Development of Coupled Simulations for Critical Dual Purpose Canisters in a Saturated Repository
This report details ongoing work in the development of simulations and techniques for critical dual-purpose canisters (DPCs) in a saturated repository with a focus on canisters that reach an equilibrium at a low, quasi-steady state power level that could be sustained for thousands of years. This report describes an effort to expand the initial methodology for predicting th…