mars::MediumPressureOptions Struct Reference

The MediumPressureOptions struct contains all medium-related (gas, liquid, fluid, etc.) variables needed for pressure calculation. More...

#include </home/runner/work/mars_lib/mars_lib/source/mars/include/mars/sensors/pressure/pressure_conversion.h>

Collaboration diagram for mars::MediumPressureOptions:

Public Member Functions
	MediumPressureOptions ()
	Default constructor for MediumPressureOptions and sets all constants to default values.
	MediumPressureOptions (double P_sl, double M, double r, double g)
	Detailted constructor for Pressure::Type::GAS constants.
	MediumPressureOptions (double rho, double g)
	Detailted constructor for Pressure::Type::LIQUID constants.
void	set_constants ()
	Sets a couple of constants for faster calculations.
void	update_constants (Pressure p0)
	Updates the constants related to the reference pressure P_0, where height = 0.
void	PrintGasOptions ()
	Print a list of all gas options currently set.

Public Attributes
const double	g { 9.80665 }
	gravity constant [m/s^2]
const double	P_sl { 101325 }
	(gas) pressure at sealevel [Pascal]
const double	M { 0.0289644 }
	(gas) molar mass of dry air [Kg/mol]
const double	r { 8.31432 }
	(gas) universal gas constant [Nm/mol*K]
const double	rho { 997 }
	(liquid) density of the medium [kg/m^3]
double	rOverMg
	(gas) = r/(M*g), for faster calculations
double	ln_Psl
	(gas) = log(P_sl), log of the pressure at sealevel
double	ln_P0PslT
	(gas) = (log(P_meas) - log(P_sl)) * T_meas
double	OneOverGRho
	(liquid) = 1/(g*rho)

Detailed Description

The MediumPressureOptions struct contains all medium-related (gas, liquid, fluid, etc.) variables needed for pressure calculation.

See also

https://en.wikipedia.org/wiki/Barometric_formula#Pressure_equations

Constructor & Destructor Documentation

MediumPressureOptions() [1/3]

mars::MediumPressureOptions::MediumPressureOptions ( )

inline

Default constructor for MediumPressureOptions and sets all constants to default values.

  {
    set_constants();
  }

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MediumPressureOptions() [2/3]

mars::MediumPressureOptions::MediumPressureOptions ( double  P_sl, double  M, double  r, double  g  )

inline

Detailted constructor for Pressure::Type::GAS constants.

Parameters

P_sl	pressure at sealevel in [Pascal] (default: 101325)
M	molar mass of dry air in [Kg/mol] (default: 0.289644)
r	universal gas constant in [Nm/(mol*K)] (default 8.3144598)
g	gravity constant in [m/s^2] (default: 9.80665)

See also

https://en.wikipedia.org/wiki/Barometric_formula#Pressure_equations

                                                                   : g(g), P_sl(P_sl), M(M), r(r)
  {
    set_constants();
  }

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MediumPressureOptions() [3/3]

mars::MediumPressureOptions::MediumPressureOptions ( double  rho, double  g  )

inline

Detailted constructor for Pressure::Type::LIQUID constants.

Parameters

rho	density of the liquid [kg/m^3] (default: 997)
g	gravity constant in [m/s^2] (default: 9.80665)

See also

https://en.wikipedia.org/wiki/Barometric_formula#Pressure_equations

                                              : g(g), rho(rho)
  {
    set_constants();
  }

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Member Function Documentation

set_constants()

void mars::MediumPressureOptions::set_constants ( )

inline

Sets a couple of constants for faster calculations.

  {
    rOverMg = r / (M * g);
    ln_Psl = std::log(P_sl);
    OneOverGRho = 1.0 / (g * rho);
  }

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update_constants()

void mars::MediumPressureOptions::update_constants ( Pressure  p0 )

inline

Updates the constants related to the reference pressure P_0, where height = 0.

Parameters

p0	Pressure to set as reference pressure

  {
    ln_P0PslT = (std::log(p0.data_) - ln_Psl) * p0.temperature_K_;
  }

PrintGasOptions()

void mars::MediumPressureOptions::PrintGasOptions ( )

inline

Print a list of all gas options currently set.

  {
    std::cout << "Medium Options:\n"
              << "\tg:          " << g << " m/s^2\n"
              << "\tGas Options:\n"
              << "\t  P_sl:     " << P_sl << " Pa\n"
              << "\t  M:        " << M << " Kg*mol\n"
              << "\t  r:        " << r << " Nm/mol*K\n"
              << "\t  rOverMg:  " << rOverMg << " Nm s^2 / mol^2 Kg Km\n"
              << "\t  ln_Psl:   " << ln_Psl << " log(Pa)\n"
              << "\tLiquid Options:\n"
              << "\t  rho:      " << rho << " Pa\n"
              << "\t  1/gRho:   " << OneOverGRho << " Pa\n"
              << std::endl;
  }

Member Data Documentation

g

const double mars::MediumPressureOptions::g { 9.80665 }

gravity constant [m/s^2]

{ 9.80665 };  

P_sl

const double mars::MediumPressureOptions::P_sl { 101325 }

(gas) pressure at sealevel [Pascal]

{ 101325 };  

M

const double mars::MediumPressureOptions::M { 0.0289644 }

(gas) molar mass of dry air [Kg/mol]

{ 0.0289644 };  

r

const double mars::MediumPressureOptions::r { 8.31432 }

(gas) universal gas constant [Nm/mol*K]

{ 8.31432 };    

rho

const double mars::MediumPressureOptions::rho { 997 }

(liquid) density of the medium [kg/m^3]

{ 997 };  

rOverMg

double mars::MediumPressureOptions::rOverMg

(gas) = r/(M*g), for faster calculations

ln_Psl

double mars::MediumPressureOptions::ln_Psl

(gas) = log(P_sl), log of the pressure at sealevel

ln_P0PslT

double mars::MediumPressureOptions::ln_P0PslT

(gas) = (log(P_meas) - log(P_sl)) * T_meas

OneOverGRho

double mars::MediumPressureOptions::OneOverGRho

(liquid) = 1/(g*rho)

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The documentation for this struct was generated from the following file:

• pressure_conversion.h