Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Sibendu Som Project Name: navistar_tbc Division: ES Project title: Modeling Heat Loss through Pistons and Effect of Thermal Boundary Coatings in Diesel Engine Simulations using a Conjugate Heat Transfer model Associated funding: DOE - Office of Vehicle Technologies, Navistar Other Systems: Navistar International Corporation Science: The aim of this project is to use CFD models to access the impact and feasibility of thermal barrier coatings to increase diesel engine efficiency. The strategy is to model the solid state heat transfer coupled to the fluid domain. Such detailed heat transfer models have demonstrated their ability to investigate heat transfer mechanisms in engine simulations which are characterized by uncertain boundary conditions. Project description: Heat loss through wall boundaries play a dominant role in the overall performance and efficiency of internal combustion engines. Typical engine simulations use constant temperature wall boundary conditions. These boundary conditions cannot be estimated accurately from experiments due to the complexities involved with engine combustion. As a result, they introduce a large uncertainty in engine simulations and serve as a tuning parameter. Modeling the process of heat transfer through the solid walls in an unsteady engine computational fluid dynamics (CFD) simulation can lead to the development of higher fidelity engine models. These models can be used to study the impact of heat loss on engine efficiency and explore new design methodologies that can reduce heat losses. In this work, the Supertruck work is further extended. A single cylinder diesel engine is modeled along with the solid piston coupled to the fluid domain. Conjugate heat transfer (CHT) model ing techniques were implemented to model heat losses for a full cycle of a Navistar diesel engine. This modeling work will be continued to future engine designs. Spray inclusion angles were found to be an important factor influencing heat transfer. This aspect needs to be studied in detail. Future simulations will also aim to model heat transfer through the engine head. The project aims to optimize the piston bowl and injection parameters while minimizing heat loss through the engine. The CFD model predictions will significantly help in evaluating future design strategies. Industry partnership: Navistar International Corporation Project URL: http://www.transportation.anl.gov/engines/multi_dim_model_home.html Current FY Hours Used: undetermined amount New FY Requested allocation: 400000 Q1: 100000 Q2: 100000 Q3: 100000 Q4: 100000 Justification: Storage requirements: 5 TB Thank You, The LCRC Accounts System