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Yanni


Last seen: 24 jours il y a |  Actif depuis 2022

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Question


How to smooth or clear the peak of the curve at certain time level?
This is the tridaigonal system. here, i incoparate the time steps and it will stop at tolerance limit. and then i got the datas ...

28 jours il y a | 1 réponse | 0

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Question


How to use iteration and error for crank nicolson type to converge spatial and temporal discretization?
I'm using iteration and error for spatial discretization and temporal discretization respectively. I want apply iteration and er...

plus d'un an il y a | 1 réponse | 0

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Question


How to obtain convergence of the curve to my boundary condtion?
I want a curve in each 'j'th iteration. But, I didn't get convergence of the curve to plot each 'j'th iterations between limit 1...

plus d'un an il y a | 1 réponse | 0

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réponse

Question


How to stop time loop when steady state is reached?
I'm using unsteady case. so, it will reach a steady state at a certain time level. I fixed time at 'j'th column wise and it ran ...

plus d'un an il y a | 1 réponse | 0

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Question


What is the steady state criteria in crank nicolson scheme, especially impilicit finite difference method? and How to stop time level when steady state is reached?
I'm dealing with unsteady case in my code. so, the CN term updated in each time step and it ran upto final time (tmax=100). but ...

plus d'un an il y a | 1 réponse | 0

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Question


How to use indices in A matrix while conditonal and for loop condtion?
How to use indices in LHS of A matrix while using for and if, esleif and else condtions? clc clear all m=5;n=7; A=zeros(m,m)...

plus d'un an il y a | 2 réponses | 0

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Question


How to change diagonal, subdiagonal and superdiagonal values with respect time while using loop and conditional statement?
xmax=1; ymax=7; m=20; n=29; dx=xmax/m; dy=ymax/n; dt=0.2; UOLD=zeros(m,n);VOLD=zeros(m,n); A=zeros([1,m]); B=A; C=A; whi...

plus d'un an il y a | 2 réponses | 0

2

réponses

Question


How to describe right hand side of energy equation in tridiagonal system? Didn't get right hand side values of tridiagonal matrix.
xmax=1; ymax=20; dx=0.05; dy=0.25; dt=0.02; m=xmax/dx; n=ymax/dy; U=zeros(m,n); V=zeros(m,n); for j =1:n D(i)=-U(i,j)*...

presque 2 ans il y a | 1 réponse | 0

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Question


There is a mistake while using condtional and for loop condtion.i got the value zero only. but i want values and here, A is subdiagonal, B is diagonal and C is superdiagonal.
xmax=1; ymax=20; dx=0.05; dy=0.25; dt=0.02;m=xmax/dx; n=ymax/dy; UOLD=zeros(m,n); VOLD=zeros(m,n); for j=1:n if i==2:m...

presque 2 ans il y a | 1 réponse | 0

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Question


here, i couldn't get the A,B,C values while using if, elseif conditions. how to get values while using conditional statement?
dx=0.05; dy=0.25; dt=0.2; for j=1:n if i==2:m C(i)=V(i,j)*dt/4*dy-dt/2*(dy)^2; elseif i==1:m-1 A(i)...

presque 2 ans il y a | 1 réponse | 0

1

réponse