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A field is generally called an
area, each point of which
corresponds to a certain value
of a certain quantity
...
Analytically, a scalar
field is described by a scalar
function (field function)
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In the future, we will consider
only stationary (steady) fields,
i
...
such fields in which the
function values do not depend
on time
...

This field is called threedimensional field
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Scalar field in a twodimensional domain is
described by a function of two
variables
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u=u(x;y)=f(x;y)
...


The equiscalar surface of a
three-dimensional scalar field
is called the locus of points at
which the field function takes
a constant value:

u(x;y;z)=С (*)

Through each specific point of
the field (x0; y0; z0) only one
equiscalar surface passes
...


Equiscalar surface examples :
- isothermal (for temperature
field);
- isobaric (for pressure field);

- equipotential (for electric
potential field)
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This is the locus of points at
which the field function takes
on a constant value:

u(x;y)=С
...




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