The phrase "a reasonable approximation for" is correct and usable in written English.
You can use it when discussing estimates or calculations that are close to a true value but not exact.
Example: "In this study, we found that the model provides a reasonable approximation for the actual data trends observed."
Alternatives: "a fair estimate of" or "a close representation of".
This is the main reason for attempting to develop a relationship that is a reasonable approximation for the Colebrook equation but which is explicit in friction factor.
In addition, for stover, a serial twofold dilution series Dot blot estimated the E1cd content of E1-1 to be approximately 3 ng/mg biomass (data not shown), which was a reasonable approximation for the Western blot analysis as well.
For long-term simulations of long pipes, the Colebrook–White equation must therefore be solved a huge number of times and hence this is the main reason for attempting to develop an accurate explicit relationship that is a reasonable approximation for the Colebrook–White equation.
And second, higher inflation is a reasonable approximation for higher demand.
Though this is a reasonable approximation for periods of a few months, it is unrealistic for 10 years.
It is demonstrated that this equation provides a reasonable approximation for all the configurations investigated.
We are therefore confident that the seasonal structure of mosquito population dynamics we have estimated is a reasonable approximation for the year 2014.
Comparing the results with analytical solution indicated that the model provides a reasonable approximation for computing fluid injection pressure.
The order limits these fees to "a reasonable approximation of their costs for processing," which the FCC estimated at about $500 for one application for up to five installations or facilities, $100 for additional facilities, and $270 per facility per year, all-inclusive.
(39) defines the original physical parameters of 2C, i.e., C1 is the ratio of reverse saturation current I0 to the short circuit current Isc, C2 is the ratio of energy equivalent VT to the open circuit voltage Voc. 2) The expressions of C1 and C2 in manufacturer's datasheet of 2C model are mostly correct under a reasonable approximation assumption for almost manufacturer's PV modules.
The total sample size for the study was 92, which is an adequate sample size because 30 or more gives a reasonable approximation [ 36] for using large sample approximations to the distribution of the test statistics that were used in our data analysis [ 37, 38].
