Study guides, Class notes & Summaries

Thorough notes for UW-Madison's Thermodynamics course. Topics applicable to courses at other universities. Topics include conservation equations/mass and energy balances, properties of real and ideal substances, reversible processes and entropy, power cycles, refrigeration cycles, psychrometrics, and combustion.

"CFD" stands for ... correct answer: Computational Fluid Dynamics CFD and Computational Aerodynamics are different names for the same thing (True or False) correct answer: False The four primary steps in the CFD process are correct answer: geometry modeling, grid generation, flow solution, post processing CFD methods are also known as "low-fidelity methods" (True or False) correct answer: False FD techniques may only be used to model air as the working fluid (True or False) c...

Pros and Cons of Experimental correct answer: Pros: -Realistic results for flight conditions in tunnel -Good for finding trends and correlating variables Cons: -Unable to match all real flight conditions (e.g. Mach and Reynolds) -Costly (equipment, manufacturing time) -tunnel corrections -Difficult to measure Pros and Cons of Theoretical correct answer: Pros: -General analytical expressions -Generally easy to use and fast to analyze Cons: -Require significant simplifying as...

"CFD" stands for correct answer: Computational Fluid Dynamics CFD and Computational Aerodynamics are different names for the same thing correct answer: False The four primary steps in the CFD process are (in order) correct answer: geometry modeling, grid generation, flow solution, post processing CFD methods are also known as "low-fidelity methods" correct answer: False CFD techniques may only be used to model air as the working fluid correct answer: False A properly writ...

What is CFD? How does CFD work? correct answer: computational fluid dynamics: a set of numerical methods applied to obtain approximate solutions of problems of fluid dynamics and heat transfer. How it Works: - The flow is broken down (discretized) into elements that make up the mesh of the fluid domain Compare and contrast FEA and CFD. correct answer: Finite Element Analysis (FEA): - Model the solid domain (i.e. model the solid itself) - Ex. Model pipe and stress on the pipe Co...

Typical shapes of unstructured grid cells used in 2D grids are quadrilateral and ______________________ correct answer: triangular a grid is ___________ if any line connecting centers of neighboring cells face between the cells correct answer: orthogonal one disadvantage of using unstructured grids is slower _____________ correct answer: convergence it is recommended for flows with attached boundary layers that the grid includes a layer of thin quadrilateral or hexahedral cells adjac...

Why should you use CFD when we know empirical and semi-empirical models have worked before? correct answer: Because it is with CFD possible to model new equipment which has not yet been tested. Thus one can simulate performance of the equipment before spending tons of money to test in reality. What can you simulate with CFD? correct answer: CFD gives a detailed analysis of flows, heat transfer and mass transfer. Can study transport of chemical species, chemical reactors, combustion, evapora...

Which question no longer concerns the modern software engineer? correct answer: Why does computer hardware cost so much? Today the increased power of the personal computer has brought about an abandonment of the practice of team development of software correct answer: False Software is a product and can be manufactured using the same technologies used for other engineering artefacts. correct answer: False Software deteriorates rather than wears out because correct answer: Multiple c...

ALL CFD ENGINEER STUDY MATERIAL 2023 QUESTIONS WITH COMPLETE SOLUTIONS

CFD STUDY SET QUESTIONS WITH COMPLETE SOLUTIONS