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ElectronDragPower.cpp
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Created
Thu, Aug 22, 07:12
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2 KB
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text/x-c
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Sat, Aug 24, 07:12 (2 d)
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blob
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20062164
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rLAMMPS lammps
ElectronDragPower.cpp
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#include "ElectronDragPower.h"
#include "Material.h"
#include "ATC_Error.h"
#include <iostream>
#include <vector>
using
ATC_Utility
::
command_line
;
using
ATC_Utility
::
str2dbl
;
using
std
::
map
;
using
std
::
string
;
using
std
::
fstream
;
using
std
::
vector
;
namespace
ATC
{
ElectronDragPowerLinear
::
ElectronDragPowerLinear
(
fstream
&
fileId
,
map
<
string
,
double
>
&
parameters
,
Material
*
material
)
:
ElectronDragPower
(),
electronDragInvTau_
(
0
),
material_
(
material
)
{
if
(
!
fileId
.
is_open
())
throw
ATC_Error
(
"cannot open material file"
);
vector
<
string
>
line
;
while
(
fileId
.
good
())
{
command_line
(
fileId
,
line
);
if
(
line
.
size
()
==
0
)
continue
;
if
(
line
[
0
]
==
"end"
)
break
;
double
value
=
str2dbl
(
line
[
1
]);
if
(
line
[
0
]
==
"inv_momentum_relaxation_time"
)
{
electronDragInvTau_
=
value
;
parameters
[
"inv_momentum_relaxation_time"
]
=
electronDragInvTau_
;
}
else
{
throw
ATC_Error
(
"unrecognized material function "
+
line
[
0
]);
}
}
}
bool
ElectronDragPowerLinear
::
electron_drag_power
(
const
FIELD_MATS
&
fields
,
const
GRAD_FIELD_MATS
&
gradFields
,
DENS_MAT
&
flux
)
{
FIELD_MATS
::
const_iterator
evField
=
fields
.
find
(
ELECTRON_VELOCITY
);
const
DENS_MAT
&
v
=
evField
->
second
;
// -1/tau (m_e * n * v)
electron_drag_velocity_coefficient
(
fields
,
dragCoefWorkspace_
);
for
(
int
i
=
0
;
i
<
v
.
nRows
();
i
++
)
{
double
velocityMagnitude
=
0.
;
for
(
int
j
=
0
;
j
<
v
.
nCols
();
j
++
)
velocityMagnitude
-=
v
(
i
,
j
)
*
v
(
i
,
j
);
flux
(
i
,
0
)
+=
velocityMagnitude
*
dragCoefWorkspace_
(
i
,
0
);
// adds flux to phonon temperature
}
return
true
;
}
void
ElectronDragPowerLinear
::
electron_drag_velocity_coefficient
(
const
FIELD_MATS
&
fields
,
DENS_MAT
&
dragCoef
)
{
FIELD_MATS
::
const_iterator
enField
=
fields
.
find
(
ELECTRON_DENSITY
);
const
DENS_MAT
&
n
=
enField
->
second
;
//n.print("DENS");
// -1/tau (m_e * n)
material_
->
inv_effective_mass
(
fields
,
invEffMassWorkspace_
);
//invEffMassWorkspace_.print("INV MASS");
dragCoef
=
n
;
dragCoef
/=
invEffMassWorkspace_
;
dragCoef
*=
-
electronDragInvTau_
;
//dragCoef.print("DRAG COEF");
}
}
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