termo.eos.alpha.TwuEquation Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of materia Show documentation

Thermodynamics properties and equilibria calculations for chemical engineering.

There is a newer version: 3.5

package termo.eos.alpha;

import termo.component.Compound;

public class TwuEquation extends Alpha {
    public TwuEquation(){
        setEquation("\\alpha(T) = T_r^{N(M-1)}e^{L\\left( 1-T_r^{NM} \\right)}");
    }
    
    @Override
    public double alpha(double temperature, Compound component) {
        double tc = component.getCriticalTemperature();
        double tr = temperature / tc;
        
        double N = component.getN_Twu();
        double M = component.getM_Twu();
        double L = component.getL_Twu();
                
        return Math.pow(tr, N * (M -1)) * Math.exp(L* (1- Math.pow(tr, N * M)));
 
    }

    @Override
    public double TempOverAlphaTimesDerivativeAlphaRespectTemperature(double temperature, Compound component) {
        double tc = component.getCriticalTemperature();
        double tr = temperature / tc;
        
        double N = component.getN_Twu();
        double M = component.getM_Twu();
        double L = component.getL_Twu();
        
        return N*( M-1) - L * N * M * Math.pow(tr, N*M);
    }
    

     @Override
    public int numberOfParameters() {
        return 3;
    }
       @Override
    public void setParameter(double value, Compound component, int index) {
        switch(index){
            case 0: component.setN_Twu(value);
                break;
            case 1: component.setM_Twu(value);
                break;
            case 2: component.setL_Twu(value);
                break;
        }
    }

    @Override
    public double getParameter(Compound component, int index) {
          switch(index){
            case 0: 
                return component.getN_Twu();
            case 1: 
                return component.getM_Twu();
            case 2: 
                return component.getL_Twu();
            default:
                return 0;
                
        }
    }

	@Override
	public String getParameterName(int index) {
		switch(index){
	        case 0 : return "N";
	        case 1: return "M";
	        case 2: return "L";
	        default: return null;
		}
	
	}
    
  

   

}