首先举个传热的例子，如有温差的气体和固体产生的对流(convection)。在假设传热系数(heat transfer coeffic...
I am running a transient heat transfer on a part where conduction and convection are the primary modes of ht. If I extend the duration of my sim I can see that my time vs temp plot will approach asymptotic inf. So from one such plot how will I estimate the time constant for the ...
式2中，T就是时间常数，它的表达式为：T=mcAKt。我们来看看T的单位是什么：秒T=mcAKt=kg(W⋅skg...
The mechanism, which dominates the heat transfer in the system, is found from the plot of the temperature dependence for the time constant. The heat loss to the surrounding gas and the thermal contact between sensor and crucible through the gas layer between are the main reasons for the ...
A thermal time-constant correlation based on experimental data is presented for gas-charged hydraulic accumulators. This correlation, along with the thermal timeconstant model, permits accurate prediction of accumulator thermodynamic losses and the gas pressure and temperature history during compression or ...
Two measured temperatures are used to estimate two unknown heat generation sources for constant and time-varying spindle speeds. Two other measured temperatures are utilized to validate the inverse results. Results show that the estimated temperatures correlate well with the measured data, and also ...
Analysis of a simple circuit for constant temperature anemometry Perturbation equations describing the response of hot wires and hot films operating in a simple constant-temperature circuit are developed. The heat transf... PD Weidman,FK Browand - 《Journal of Physics E Scientific Instruments》 被引...
Experimental study was carried out in discontinuous operation in 2 hours operation with constant interval of off-time. As a result, the heat exchange rate in the short-time period of operation in discontinuous operation increases of 53.1 % for double-tube, 33.3 % for U-tube, and 29.1 % for...
Idealized images in the resulting species-specific atlases capture the essence of characteristic stages and link them to absolute developmental time, assuming that morphological traits are constant within a developmental stage and that stages can be correlated reliably with absolute measured time. However,...
3a, where the heat transfer path under consideration is the transverse narrow region at y = 0. We assume constant temperatures on the left and right sides at x = 0 and L, while periodic boundaries are assumed on the upper and lower sides at y = ±dy/2. ρ(x,y = 0,t) and κ(...