thermalheatsinkspot

N-port grid array substrate with NxN surface heating elements

Click here for pdf documentation.

Author(s): Bill Batty, Carlos Christoffersen
  • Number of terminals for this element is variable.


    • Usage:

    Parameter TypeDefault value Required?
    ntimesteps: Number of time steps in transient simulation INTEGER 0 no
    dt: Length of timestep (s) DOUBLE 0 no
    tambient: Ambient temperature (K) DOUBLE 300 no
    time_d: Flag, if true, calculate in the time domain. BOOLEAN false no
    read_input: Flag, read_input thermal resistance matrices from file. BOOLEAN false no
    l: Substrate x-dimension in meters. DOUBLE 0.05 no
    w: Substrate y-dimension in meters. DOUBLE 0.05 no
    d: Substrate z-dimension in meters. DOUBLE 0.0016 no
    ks: Thermal conductivity (W/m.K). DOUBLE 0.294 no
    rho: Density (kg.m-3). DOUBLE 1900 no
    c: Specific heat (J/kg.K). DOUBLE 1150 no
    xi: Adjustment for T**4 non linearity DOUBLE 1.3 no
    eta: Adjustment for natural convection DOUBLE 3 no
    epsilon: Emissivity DOUBLE 0.7 no
    narray: Order of NxN grid array INTEGER n/a yes
    ndevices: Number of heat dissipating devices INTEGER 1 no
    b: Exponent in power law temperature dependence of thermal conductivity DOUBLE 0 no

    fREEDA Version 1.3 compiled on Jul 25 2007 12:04:09