We should always remember that all the computing power and the engineering
software packages available today are just tools, and tools have
meaning only in the hands of masters. Having the best word-processing program
does not make a person a good writer, but it certainly makes the job of
a good writer much easier and makes the writer more productive (Fig.
1–39). Hand calculators did not eliminate the need to teach our children
how to add or subtract, and the sophisticated medical software packages did
not take the place of medical school training. Neither will engineering software
packages replace the traditional engineering education. They will simply
cause a shift in emphasis in the courses from mathematics to physics.
That is, more time will be spent in the classroom discussing the physical
aspects of the problems in greater detail, and less time on the mechanics of
solution procedures.
All these marvelous and powerful tools available today put an extra burden
on today’s engineers. They must still have a thorough understanding of
the fundamentals, develop a “feel” of the physical phenomena, be able to
put the data into proper perspective, and make sound engineering judgments,
just like their predecessors. However, they must do it much better,
and much faster, using more realistic models because of the powerful tools
available today. The engineers in the past had to rely on hand calculations,
slide rules, and later hand calculators and computers. Today they rely on
software packages. The easy access to such power and the possibility of a
simple misunderstanding or misinterpretation causing great damage make it
more important today than ever to have solid training in the fundamentals of
engineering. In this text we make an extra effort to put the emphasis on
developing an intuitive and physical understanding of natural phenomena
instead of on the mathematical details of solution procedures.
Engineering Equation Solver (EES)
EES is a program that solves systems of linear or nonlinear algebraic or differential
equations numerically. It has a large library of built-in thermodynamic
property functions as well as mathematical functions, and allows the
user to supply additional property data. Unlike some software packages,
EES does not solve engineering problems; it only solves the equations supplied
by the user. Therefore, the user must understand the problem and formulate
it by applying any relevant physical laws and relations. EES saves
the user considerable time and effort by simply solving the resulting mathematical
equations. This makes it possible to attempt significant engineering
problems not suitable for hand calculations and to conduct parametric studies
quickly and conveniently. EES is a very powerful yet intuitive program
that is very easy to use, as shown in Example 1–5. The use and capabilities
of EES are explained in Appendix 3 on the enclosed DVD.
We should always remember that all the computing power and the engineering
software packages available today are just tools, and tools have
meaning only in the hands of masters. Having the best word-processing program
does not make a person a good writer, but it certainly makes the job of
a good writer much easier and makes the writer more productive (Fig.
1–39). Hand calculators did not eliminate the need to teach our children
how to add or subtract, and the sophisticated medical software packages did
not take the place of medical school training. Neither will engineering software
packages replace the traditional engineering education. They will simply
cause a shift in emphasis in the courses from mathematics to physics.
That is, more time will be spent in the classroom discussing the physical
aspects of the problems in greater detail, and less time on the mechanics of
solution procedures.
All these marvelous and powerful tools available today put an extra burden
on today’s engineers. They must still have a thorough understanding of
the fundamentals, develop a “feel” of the physical phenomena, be able to
put the data into proper perspective, and make sound engineering judgments,
just like their predecessors. However, they must do it much better,
and much faster, using more realistic models because of the powerful tools
available today. The engineers in the past had to rely on hand calculations,
slide rules, and later hand calculators and computers. Today they rely on
software packages. The easy access to such power and the possibility of a
simple misunderstanding or misinterpretation causing great damage make it
more important today than ever to have solid training in the fundamentals of
engineering. In this text we make an extra effort to put the emphasis on
developing an intuitive and physical understanding of natural phenomena
instead of on the mathematical details of solution procedures.
Engineering Equation Solver (EES)
EES is a program that solves systems of linear or nonlinear algebraic or differential
equations numerically. It has a large library of built-in thermodynamic
property functions as well as mathematical functions, and allows the
user to supply additional property data. Unlike some software packages,
EES does not solve engineering problems; it only solves the equations supplied
by the user. Therefore, the user must understand the problem and formulate
it by applying any relevant physical laws and relations. EES saves
the user considerable time and effort by simply solving the resulting mathematical
equations. This makes it possible to attempt significant engineering
problems not suitable for hand calculations and to conduct parametric studies
quickly and conveniently. EES is a very powerful yet intuitive program
that is very easy to use, as shown in Example 1–5. The use and capabilities
of EES are explained in Appendix 3 on the enclosed DVD.
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