"experimental formula" is correct and usable in written English.
You can use it when you are referring to a recipe or a scientific formula that is still being tested or that is in the process of being established. For example: "The team is working on an experimental formula to develop a new type of concrete."
This correlation can be described by an experimental formula.
Therefore, strictly speaking, the experimental formula is a kind of 'semi-experimental' one.
The porosity was calculated using an experimental formula developed by direct observation, which was used in combination with other referenced methods.
We obtained an experimental formula, V(M) ∝ D M) ∝ M−H, where D is a self-diffusion constant and H is a constant, H=0.7.
Experimental formula that V∝V0∝D∝M−H where D is self-diffusion constant and H is a constant; H=1.7 was obtained.
A similar study on extended-chain single crystals (ECSCs) reported in our previous paper gave the same experimental formula but H was much smaller, H=0.7.
Using these experimental formulas and our first-principles calculations, we further predicted the microhardness of some novel potential hard/superhard covalent compounds (BC2N, AlMgB14, TiO2, ReC, and PtN2).
Critics of the program were accusing the Defense Department of using one of the experimental formulas, which featured an oil-based additive called squalene, in vaccines given to military personnel in the gulf war, a decision, they contended, that may have caused autoimmune diseases among returning soldiers.
Experimental formulas for predicting vertical building surface concentration profiles on the downwind tower have been derived with a mean prediction error of 22%.
According to the experimental results of the aerodynamic admittance function for deck sections, the measured aerodynamic admittance functions were different from Sears' function and some experimental formulas were suggested.
The relations obtained between the PINI and the experimental formulas were linear (y = ax + b) with formulas without Log and nonlinear when a Log was used (y = ax2 + bx + c or y = log(x) + b).
