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TeyhaNeedHelp

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5 years, 272 days
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These are replies submitted by TeyhaNeedHelp

Thank you...

TeyhaNeedHelp 15
November 14 2019
0 0

@tomleslie Thank you. This really help. :)

It works...

TeyhaNeedHelp 15
November 14 2019
0 0

@Kitonum Thank you for your help. It works, Is there any possibility to find the value of infinity? Can loop be use to find it? 

Noted...

TeyhaNeedHelp 15
November 14 2019
0 0

@dharr Thank you for the reminder. 

Thank you...

TeyhaNeedHelp 15
November 11 2019
0 0

@Kitonum Thank you for your help. Is it possible for me to display the numerical value. Can i use evalf to get the specific value of f(eta) and theta(eta). Thanks again. 

I get an error...

TeyhaNeedHelp 15
November 11 2019
0 0

@Carl Love I'm sorry for troubling you, but i really didn't know whether i do this correctly or not because there's an error.
 

> 

restart
> 

ode1 := diff(f(eta), `$`(eta, 3))+(diff(f(eta), `$`(eta, 2)))*f(eta)-(diff(f(eta), eta))^2-M.(diff(f(eta), eta))-A.(diff(f(eta), eta)+(1/2)*(eta.(diff(f(eta), `$`(eta, 2))))) = 0

diff(diff(diff(f(eta), eta), eta), eta)+(diff(diff(f(eta), eta), eta))*f(eta)-(diff(f(eta), eta))^2-M.(diff(f(eta), eta))-A.(diff(f(eta), eta)+(1/2)*(eta.(diff(diff(f(eta), eta), eta)))) = 0

 (1)
> 

ode2 := diff(theta(eta), `$`(eta, 2))+Pr*(f(eta).(diff(theta(eta), eta))-(diff(f(eta), eta)).theta(eta)-A.(theta(eta)+1/2.eta.(diff(theta(eta), eta)))) = 0

diff(diff(theta(eta), eta), eta)+Pr*(f(eta).(diff(theta(eta), eta))-(diff(f(eta), eta)).theta(eta)-A.(theta(eta)+(1/2)*(eta.(diff(theta(eta), eta))))) = 0

 (2)
> 

bcs := f(0) = 0, (D(f))(0) = 1, (D(f))(inf) = 0, theta(0) = 1, theta(inf) = 0
> 

sol := dsolve({ode1, ode2, f(0) = 0, theta(0) = 1, theta(3) = 0, (D(f))(0) = 1, (D(f))(3) = 0}, numeric)

Error, (in dsolve/numeric/bvp/convertsys) too few boundary conditions: expected 8, got 5

  
> 

``


 

Download dsolve.mw

The value from graph...

TeyhaNeedHelp 15
October 22 2019
0 0

@Carl Love i'm sorry for the misunderstanding, what i mean is to display the value of the curve from the graph, which is f'(eta) and eta itself. Sorry again. 

Sorry...

TeyhaNeedHelp 15
October 18 2019
0 0

@Carl Love Sorry for the late reply. i've checked the paper, there are no f''(6)=0 in the paper but i put the third boundary condition as f'(inf)=0 and it works just fine. Thank you for your help. I've been wondering how to display the value in numeric. can i just use dsolve. try that and i display error.

Thank you...

TeyhaNeedHelp 15
October 03 2019
0 0

@Carl Love This really helps. Thanks alot. :)

Thank you...

TeyhaNeedHelp 15
October 03 2019
0 0

@Rouben Rostamian  thanks for your help. i will check it again.

Graph of f...

TeyhaNeedHelp 15
October 02 2019
0 0

@Rouben Rostamian i'm a bit new to maple, how can i find the graph of f and not the graph of the derivative of f. Thank you. 

Thank you...

TeyhaNeedHelp 15
October 01 2019
0 0

@Kitonum thank you for enlighten me. Maybe there are something wrong with the journal because all the intial condition were given in the journal. 

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