Setup and Delete Transient for Query

hooks.php

<?php
/**
 * Delete Career transient on post save.
 *
 * @since  1.0.0
 * @author jomurgel
 */
function _delete_default_blog_post_transient() {
	delete_transient( 'default_blog_posts' );
}
add_action( 'delete_category', '_delete_default_blog_post_transient' );
add_action( 'save_post', '_delete_default_blog_post_transient' );

queries.php

<?php
/**
 * Get default blog river, paginated.
 *
 * @author jomurgel
 * @since 1.0.0
 * @return array $data new wp query.
 */
function _get_default_blog_posts() {

	// Set transient key.
	$transient_key = 'default_blog_posts';

	$data = get_transient( $transient_key );

	if ( false !== $data && ! isset( $_GET['delete-transients'] ) ) { // WPCS: CSRF OK.
		return $data;
	}

	$paged = get_query_var( 'paged' ) ? get_query_var( 'paged' ) : get_query_var( 'page' ) ? get_query_var( 'page' ) : 1;

	// Set up query args.
	$args = array(
		'post_type'      => 'post',
		'posts_per_page' => get_option( 'posts_per_page' ),
		'paged'          => $paged,
	);

	// Run query.
	$data = new WP_Query( $args );

	// Set transient, and expire after a max of 12 hours.
	set_transient( $transient_key, $data, 12 * HOUR_IN_SECONDS );

	return $data;
}