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wzelik

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14 years, 249 days

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These are replies submitted by wzelik

re-uploaded once again...

wzelik 70
October 25 2013
0 0

Hi,

I enclose,

wzel

 

HT_one_layer.mw

clear...

wzelik 70
August 16 2013

Thank you very much for your help.

 

wzel 

hmax parametr explanations...

wzelik 70
August 16 2013

Hi again,

I forgot explain of paramters of hmax equation,

hmax – maximum cappilary rice,

sigma – surface tension,

theta – wetting angle,

r – cappilary radius,

rho – dencity of liquid,

alpha – slope of cappilary (0-90 deg)

g – of course, acceleration of gravity

 

wzel

hmax problem...

wzelik 70
August 16 2013

Hi,

Thank you for prompt answer.

But, how to understand particular solution , when in cappilary rice, hmax (eq8) from equality eq6 and eq7 is positive, and we get expressions containing ln(-hmax) ???

wzel

indeed...

wzelik 70
May 24 2013
0 0

@acer it's works, you are right!

...as always maple community can count for you.

 

wzel

indeed...

wzelik 70
May 24 2013

@acer it's works, you are right!

...as always maple community can count for you.

 

wzel

once more...

wzelik 70
May 22 2013
0 0

@Acer

As I said, big thank you for given solution, but...

could you check once more, another problem with fsolve...

I enclose a file...

 

 

test1.mw

 

wzel

once more...

wzelik 70
May 22 2013

@Acer

As I said, big thank you for given solution, but...

could you check once more, another problem with fsolve...

I enclose a file...

 

 

test1.mw

 

wzel

fsolve in module - F1...

wzelik 70
May 22 2013
0 0

Thank you,

 

wzel

fsolve in module - F1...

wzelik 70
May 22 2013

Thank you,

 

wzel

Hi,    I don't belive that M...

wzelik 70
January 19 2013

Hi, 

 

I don't belive that Maple can't produced correct solution. Is there a chance to get any advice?

I would be appreciated,

 

wzel

 

Further question...

wzelik 70
January 16 2013

Hi again,

What is wrong with solutions?

Why result is incorect comparing to the Mathcad?

wzel

 

> 

restart

Data's: (rho+[-kg/m^3], Do+[-m], L+[-m], eta+[-Pa*s], g+[-m/s^2], h+[-m])

> 

rho := 8740:``

Reynolds number:

> 

RE := proc (V) options operator, arrow; Do*V*rho/eta end proc:

Darcy friction factor:

> 

lambda := proc (RE) options operator, arrow; piecewise(4400 < RE, .3164/(V*Do*rho/eta)^.25, 64/RE) end proc;

proc (RE) options operator, arrow; piecewise(4400 < RE, .3164/(V*Do*rho/eta)^.25, 64/RE) end proc

 (1)

Darcy-Weisbach equation

> 

eq := rho*g*h = (1/2)*lambda(RE(V))*L*V^2/Do

300087.900 = 12.50000000*piecewise(4400 < 104880.0000*V, 0.1758179877e-1/V^.25, 0.6102212052e-3/V)*V^2

 (2)

Velocity [m*s^(-1)]

> 

Vo := fsolve(eq, V = 1)

3205.320961

 (3)
> 

``

 

 

Mathcad solution below

 

Download Vo_DW_ew_1.mw

 

 

 

Additional...

wzelik 70
January 09 2013

Hi,

ad1. Please see enclosed,

ad2. ...Indeed, it is liquid metal..

ad3. Why?, For Mathcad is not a problem. Maple in units area is even stronger, but of course less comfortable.
I'm couriuos if it possible to solved Darcy-Weisbach equation in Maple in the same (or similar) way.

 

Are you mean m and cm?, and:

>>>Don't mix m and sm

it's typping error... :-)

 

wzel

Vo_DW_eq.mw

it seems that everything is clear...

wzelik 70
March 24 2012
0 0

Thank you Jarekkk!

 

wzel

it seems that everything is clear...

wzelik 70
March 24 2012

Thank you Jarekkk!

 

wzel

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