PlasmaCalcs.mhd.multifluid.mhd_fluids.MhdFluid

class PlasmaCalcs.mhd.multifluid.mhd_fluids.MhdFluid(name=None, i=None, *, m=None, q=None)

abstract base class for any fluid in multifluid analysis of single-fluid mhd.

E.g. Specie or IonMixture.

Every MhdFluid is an ElementHandler (e.g. has self.get_element(), might return None or crash)

however not necessarily an ElementHaver (has self.element, probably non-None)

Methods

`__init__`([name, i, m, q])
`copy`(**kw_init)
`deserialize`(serial)
`equal_except_i`(v)
`from_dict`(d)
`get_element`([default])
`get_elements`([default])
`ion`([q])
`is_charged`()
`is_electron`()
`is_ion`()
`is_neutral`()
`lookup_dict`()
`neutral`(**kw_specie)
`register_type`(cls_to_register[, ...])
`saha_list`(*[, istart])
`serialize`()
`to_dict`()
`with_i`(i)

Attributes

copy(**kw_init): return a copy of self. Can provide new kwargs here to override old values in result.

E.g. self.copy(i=7) makes a copy of self but with i=7 instead of self.i.

static deserialize(serial)

creates an XarrayIoSerializable object from a serialized representation.

serial: dict or str: str –> convert to dict via ast.literal_eval.

dict must contain ‘typename’ key.

The output here will be an instance of XarrayIoSerializable.SERIAL_TYPES[typename]

equal_except_i(v): returns whether self == v (another DimensionValue), ignoring i.

equal if v is an instance of type(self) and

all kw from both self._kw_eq and v._kw_eq have the same values.

(any kw missing attrs will be treated as UNSET.)

For DimensionValue: self.s==v.s and self.i==v.i. Subclasses may add more.

classmethod from_dict(d): return cls from dict d.

If ‘d’ contains ‘typename’, result is like cls.deserialize(d) instead,

however, first require that result is an instance of cls (or subclass of cls).

E.g. Fluid.from_dict(dict(typename=’EppicDist’, …)) returns EppicDist,

but Snap.from_dict(dict(typename=’EppicDist’, …)) crashes with InputError.

Subclasses wishing to alter deserialize behavior will probably override this method instead.

get_element(default=NO_VALUE)

return self.element if it exists and is not None, else crash with FluidKeyError.

default: NO_VALUE or any value.: If provided, when element missing or None, return default instead of crash.

get_elements(default=NO_VALUE): return list of elements in self.

The implementation here just returns [self.get_element(default=default)].

ion(q=1, **kw_specie): return ionized Specie of self.get_element()

q: charge in elementary charge units. (default: +1)

is_charged(): tells whether self is a charged fluid. i.e. self.q != 0.

if self.q is None, returns None instead of bool.

is_electron(): tells whether self is an electron. i.e. self.q < 0.

if self.q is None, returns None instead of bool.

is_ion(): tells whether self is an ion. i.e. self.q > 0.

if self.q is None, returns None instead of bool.

is_neutral(): tells whether self is a neutral fluid. i.e. self.q == 0.

if self.q is None, returns None instead of bool.

lookup_dict(): returns dict for looking up self within a DimensionValueList, given int, str, or self.

(used by DimensionValueList.lookup_dict)

static register_type(cls_to_register, _serial_typename=None)

register cls_to_register as a serializable subclass of XarrayIoSerializable.

_serial_typename: str or None: name to use for serialization. if None, use cls_to_register.__name__.

saha_list(*, istart=0, **kw_specie): return SpecieList of neutral & once-ionized ions of self.get_element().

istart: start index for the SpecieList. Index affects conversion to int.

to_dict(): return dictionary of info about self. Attribute values for keys in self._kw_def.

e.g. if _kw_def={‘s’, ‘i’}: result = {‘s’: self.s, ‘i’: self.i}