With the mission of introducing engineering early in the undergraduate curriculum, the freshman engineering course has developed the following goals: (1) Introduce an engineering approach for problemsolving through team projects; (2) Demonstrate the importance of graphical, oral, and written communication skills; (3) Incorporate the skill oriented tusks, such as analysis and interpretation of experimental dat+ into design projects. Essential skills taught in the freshman engineering course are: graphical presentation including sketching and solid modeling, use of engineering principles with physics and math for analysis, construction and testing of working prototypes, and documentation of the solution. Students are also instructed on how to manage their projects and work in teams.This paper discusses the challenges and opportunities that are involved in instituting a design-driven freshman curriculum at a large university. The paper will discuss issues related to design curriculum development, type and ingredients of a team design project, laboratory preparations, and cost and benefits of implementing the design activities. Although our efforts are ongoing, significant gains have been achieved that are worth sharing with the engineering education community.
A numerical model is developed to study the flow of a thermoset resin parallel to a unidirectional, heated fiber array, where the resin viscosity varies with temperature. Steady, incompressible flow is assumed when solving the momentum equation for the velocity parallel to the fiber tow. Resin temperatures are determined by applying a finite differencing scheme to the convective energy equation. An iterative approach is used to update the velocity, temperature, and viscosity in the flow direction. The resulting nonisothermal flow profiles are 'plug-like" with significant increases in the velocities near the fibers. Comparisons of average total flow times for isothermal and nonisothermal flows indicate that, for an epoxy resin at an initial 250C and the fibers heated to 100°C. the fill time is equivalent to the isothermal case with the resin held at a constant 50°C.
The consequences of immersing a body in a Stokesian flow can be studied in the language employed in scattering research. After implementing the description of Stokesian flow in terms of velocity and pressure phasors, we formulate mathematical expressions delineating the Huygens principle for both phasors. Application is then made to scattering problems with special emphasis on impenetrable bodies.
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