Excel in MEExcel in ME1-D Transient Heat 1-D Transient Heat Conduction Add-inConduction Add-in

Loading an Add-in• Download Heat Transfer.xla from

www.me.ua.edu/excelinme • Possible to open as a file

– It runs slower– Need to set Tools→Macros →Security to Medium or Low

• Load as an Add-in– Faster– No security problems

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Functions• Functions return the dimensionless temperature, *

• Tslab(xstar, Fo, Bi)

• Tcyl(rstar, Fo, Bi)

• Tsph(rstar, Fo, Bi)

• Function Wizard – User Defined

TTTT

i

*

Inputs• Dimensionless length, rstar or xstar

– rstar = r / R

– xstar = x / L

• Fourier Number - Fo = t / L2

• Biot Number - Bi = hL / k

r

R

L

x

L

x

L = R

Semi-Infinite Solid• TsemiInf(BCtype, x, alpha, t, k, BC)• BCtype - Boundary condition type

– 1 - Constant Surface Temperature, returns

– 2 - Constant Surface Heat Flux, returns

– 3 - Surface Convection, returns

• x - distance from surface• alpha - = k / c [m2/s]• t - time• k - conduction coefficient [W/m-K]

– Only necessary for BCtype 2 & 3• BC - Boundary condition value

– Only necessary for BCtype 2 & 3– BCtype 2 - BC = q"0, surface heat flux [W/m2]– BCtype 3 - BC = h, convection coefficient [W/m2-K]

x

si

s

TTTtxT

),(

iTtxT ),(

i

i

TTTtxT

),(