Techniques for data center analysis are provided. In one aspect, a method for modeling thermal distributions in a data center is provided. The method includes the following steps. Vertical temperature distribution data is obtained for a plurality of locations throughout the data center. The vertical temperature distribution data for each of the locations is plotted as an s curve, wherein the vertical temperature distribution data reflects physical conditions at each of the locations which is reflected in a shape of the s curve. Each of the s curves is represented with a set of parameters that characterize the shape of the s curve, wherein the s curve representations make up a knowledge base model of predefined s curve types from which thermal distributions and associated physical conditions at the plurality of locations throughout the data center can be analyzed.