How to return two list with a double method?

Question

I'm working on a C# program that getting some values from textboxes and set them to some variables in 2 class that their name is:"Tfluid" and "Twell"

then I use them in another class the name is "Tcalc" through a method with name "fluidcal" and make some calculations with them,

I have 2 crossed while that means it starts with a "ql" and then match a final P to each "ql". now I want to use these (ql, P) to plot a graph in another form,

so what is the best way of saving them (i don't know what should I return with the fluidal method)

and how can I add them to the chart?

this is my calculation process

public double Fluidcal(TWell well, TFluid fluid)
    {
        double froudnumber, noslipholdup, vm, vsl, vsg, liquidvelocitynumber, l1, l2, l3, l4, fluidregim, hozhold, C, psy, liqhold, liqholdseg, liqholdinter, fn, nren, densityn, viscosityn, y, S, ftp, dpdzel, dpdzf, dpperdzt, rhos, Ek,ql;
        ql = 1;

        while (ql<=fluid.maxoilflowrate)
        {
            vsl = (ql) / Math.PI * Math.Pow(well.tubingdiameter / 2, 2); //superficial velocities
            vsg = (ql * fluid.gor) / Math.PI * Math.Pow(well.tubingdiameter / 2, 2);
            vm = vsl + vsg;
            double nowlength = 0;
            double P = well.wellheadpressure;
            while (nowlength <= well.welldepth)
            {

                froudnumber = Math.Pow(vm, 2) / well.tubingdiameter * 32.174;  //froud number
                noslipholdup = vsl / vm;   //no slip holdup
                double newoildensity = fluid.oildensity / (1 + 0.00056 * (0.01515 * nowlength));
                liquidvelocitynumber = vsl * Math.Pow((newoildensity / 32.174 * fluid.gasliquidsurfacetension), 0.25); //liquid velocity number
                                                                                                      //correlating parametrs
                l1 = 316 * Math.Pow(noslipholdup, 0.302);
                l2 = 0.0009252 * Math.Pow(noslipholdup, -2.4684);
                l3 = 0.1 * Math.Pow(noslipholdup, -1.4516);
                l4 = 0.5 * Math.Pow(noslipholdup, -6.738);
                fluidregim = 0;
                C = 0;
                liqhold = 0;
                if ((noslipholdup < 0.01 && froudnumber < l1) || (noslipholdup >= 0.01 && froudnumber < l2))
                {
                    segregated(froudnumber, noslipholdup, liquidvelocitynumber, out fluidregim, out hozhold, out C, out psy, out liqhold);
                }
                else if ((noslipholdup >= 0.01 && l2 < froudnumber && froudnumber <= l3))
                {
                    transition(froudnumber, noslipholdup, liquidvelocitynumber, l2, l3, out fluidregim, out hozhold, out C, out psy, out liqhold, out liqholdseg, out liqholdinter);

                }
                else if ((noslipholdup >= 0.01 && noslipholdup < 0.4 && froudnumber > l3 && froudnumber <= l1)
               || (noslipholdup >= 0.4 && l3 < froudnumber && froudnumber <= 4))
                {
                    intermittent(froudnumber, noslipholdup, liquidvelocitynumber, out fluidregim, out hozhold, out C, out psy, out liqhold);
                }
                else if ((noslipholdup < 0.4 && froudnumber >= l1) || (noslipholdup >= 0.4 && froudnumber > l4))
                {
                    disturbuted(froudnumber, noslipholdup, out fluidregim, out hozhold, out C, out psy, out liqhold);

                }
               // else
               // {
                //    System.Windows.Forms.MessageBox.Show("Undefined Flow Regim");
                //}
                y = noslipholdup / Math.Pow(liqhold, 2);
                if (y > 1 && y < 1.2)
                {
                    S = Math.Log(2.2 * y - 1.2);


                }
                else
                {
                    S = (Math.Log(y)) / (-0.0523 + 3.182 * Math.Log(y) - 0.8725 * Math.Pow(Math.Log(y), 2) + 0.01853 * Math.Pow(Math.Log(y), 4));
                }

                    viscosityn = fluid.oilviscosity * noslipholdup + fluid.gasviscosity * (1 - noslipholdup);
                    densityn = fluid.oildensity * noslipholdup + (1 - noslipholdup) * fluid.gasdensity;
                    nren = densityn * vm * (well.tubingdiameter) / viscosityn;
                    fn = 1 / Math.Pow((2 * Math.Log(nren / (4.5223 * Math.Log(nren) - 3.8215))), 2);
                    ftp = fn * Math.Exp(S);
                    rhos = fluid.oildensity * liqhold + fluid.gasdensity * (1 - liqhold);
                    Ek = rhos * vm * vsg / 32.2 * P;
                    dpdzel = (1) * rhos;
                    dpdzf = ftp * densityn * Math.Pow(vm, 2) / 2 * 32.174 * well.tubingdiameter;
                    dpperdzt = (dpdzel + dpdzf) / 1 - Ek;
                    P = P + 5 * dpperdzt;




                yax.Add(P);

                nowlength = +5;
                vsl = vm * liqhold;
                vsg = vsl * fluid.gor;
            }

            ql = +20;



        }return; //what should I write here?I want pairs of(ql,P)

Check out [tuples](https://learn.microsoft.com/en-us/dotnet/csharp/tuples). — kovac, May 21 '19 at 06:33

score 0 · Answer 1 · answered May 21 '19 at 06:36

There are a few ways you could do this. I would suggest encapsulating the lists in an object and returning that object from your method. For example:

public class MyLists
{
    public List<double> ListOne { get; set; }
    public List<double> ListTwo { get; set; }
}

Of course, you could use a Tuple. If I understand your question correctly...

How to return two list with a double method?

1 Answers1